| Subject | English | Spanish |
| gen. | a bitter green vegetable | una verdura verde y amarga |
| food.ind., chem. | alpha-bitter acid | ácido alfalupulínico |
| food.ind., chem. | alpha-bitter acid | humulona |
| food.ind., chem. | alpha-bitter acid | 6R-3,5,6-trihidroxi-4,6-bis3-metilbut-2-en-1-il-2-3-metil-1-oxobutilciclohexa-2,4-dien-1-ona |
| agric. | aromatic bitter | amargo aromático |
| food.ind., chem. | beta-bitter acid | lupulona |
| food.ind., chem. | beta-bitter acid | ácido betalupulínico |
| food.ind. | bitter ale | "bitter ale" |
| agric. | bitter almond | almendra amarga |
| bot. | bitter almond | almendro de fruto amargo Prunus amygdalus var. amara |
| bot. | bitter almond | almendro amargo Prunus amygdalus var. amara |
| agric. | bitter almond cake | tortas de almendras amargas |
| chem. | bitter almond oil | aceite de almendras amargas |
| agric. | bitter almond tree | almendro amarga (Prunus amygdalus var. amara) |
| agric. | bitter almond tree | almendro amargo (Prunus dulcis var. amara, Prunus amygdalus var. amara) |
| horticult. | bitter aloes | áloes |
| horticult. | bitter aloes | acíbar |
| nat.res., agric. | bitter apple | alhandal (Citrullus colocynthis) |
| bot. | bitter apple | tuera Citrullus colocynthis |
| bot. | bitter apple | alhandal Citrullus colocynthis |
| nat.res., agric. | bitter apple | tuera (Citrullus colocynthis) |
| nat.res., agric. | bitter apple | coloquintida (Citrullus colocynthis) |
| nat.res., agric. | bitter apple | coloquinta (Citrullus colocynthis) |
| bot. | bitter apple | coloquíntida Citrullus colocynthis |
| agric. | bitter aromatized wine | vino aromatizado amargo |
| bot. | bitter buttons | hierba lombriguera Tanacetum vulgare |
| bot. | bitter buttons | tanaceto Tanacetum vulgare |
| food.ind. | bitter chocolate | chocolate amargo |
| el. | Bitter coil | bobina de Bitter |
| el. | Bitter coil | solenoide de discos |
| phys.sc. | bitter coil | solenoide en disco |
| bot. | bitter cucumber | coloquíntida Citrullus colocynthis |
| bot. | bitter cucumber | alhandal Citrullus colocynthis |
| nat.sc., agric. | bitter cucumber | pepinillo del diablo (Momordica charantia) |
| nat.sc., agric. | bitter cucumber | cohombrillo (Momordica charantia) |
| nat.sc., agric. | bitter cucumber | amargo (Momordica charantia) |
| nat.sc., agric. | bitter cucumber | momordica (Momordica charantia) |
| nat.sc., agric. | bitter cucumber | pepino (Momordica charantia) |
| bot. | bitter cucumber | tuera Citrullus colocynthis |
| agric. | bitter cucumber | momórdica (Momordica charantia) |
| agric. | bitter cucumber | cohombrillo amargo (Momordica charantia) |
| nat.res., agric. | bitter cucumber | coloquintida (Citrullus colocynthis) |
| nat.res., agric. | bitter cucumber | coloquinta (Citrullus colocynthis) |
| nat.res., agric. | bitter cucumber | alhandal (Citrullus colocynthis) |
| nat.res., agric. | bitter cucumber | tuera (Citrullus colocynthis) |
| agric. | bitter cucumber | pepino amargo (Momordica charantia) |
| agric. | bitter cucumber | pepinillo del díablo (Momordica charantia) |
| nat.sc., agric. | bitter dock | aguja de pastor (Rumex obtusifolius) |
| nat.sc., agric. | bitter dock | acedera obtusifolia (Rumex obtusifolius) |
| transp., nautic., fish.farm. | bitter end | bitadura |
| bot. | bitter fennel | hinojo Foeniculum vulgare |
| bot. | bitter fennel | hinojo amargo Foeniculum vulgare |
| agric., chem. | bitter flavour | sabor amargo |
| bot. | bitter gourd | coloquíntida Citrullus colocynthis |
| nat.res., agric. | bitter gourd | coloquintida (Citrullus colocynthis) |
| nat.res., agric. | bitter gourd | coloquinta (Citrullus colocynthis) |
| nat.res., agric. | bitter gourd | alhandal (Citrullus colocynthis) |
| nat.res., agric. | bitter gourd | tuera (Citrullus colocynthis) |
| nat.sc., agric. | bitter gourd | pepino (Momordica charantia) |
| nat.sc., agric. | bitter gourd | amargo (Momordica charantia) |
| bot. | bitter gourd | alhandal Citrullus colocynthis |
| nat.sc., agric. | bitter gourd | cohombrillo (Momordica charantia) |
| bot. | bitter gourd | tuera Citrullus colocynthis |
| nat.sc., agric. | bitter gourd | momordica (Momordica charantia) |
| nat.sc., agric. | bitter gourd | pepinillo del diablo (Momordica charantia) |
| nat.sc., agric. | bitter hickory | hicoria | jicoria amarga (Carya amara, Carya cordiformis) |
| bot. | bitter hickory | caria amarga Carya amara, cordiformis |
| agric. | bitter hops | lúpulo amargo |
| med. | bitter limit concentration | concentración límite de amargor |
| med. | bitter lupin | altramuz amargo |
| agric. | bitter milk | leche amarga |
| nat.sc., agric. | bitter oak | roble de Turquía (Quercus cerris) |
| nat.sc., agric. | bitter oak | marojo (Quercus cerris) |
| nat.sc., agric. | bitter oak | Roble turco (Quercus cerris) |
| nat.sc., agric. | bitter oak | roble cerris (Quercus cerris) |
| nat.sc., agric. | bitter oak | roble cabelludo (Quercus cerris) |
| agric. | bitter orange | toronja |
| agric. | bitter orange | naranja de Sevilla Citrus aurantium |
| agric. | bitter orange | toronjas (Citrus aurantium l. subsp. aurantium l) |
| agric. | bitter orange | naranja amarga |
| agric. | bitter orange | naranja agria |
| horticult. | bitter orange oil | esencia de naranja amarga |
| agric. | bitter orange tree | toronjo (Citrus aurantium, Citrus aurantium var.bigaradia) |
| bot. | bitter orange tree | naranjo agrio Citrus aurantium, vulgaris |
| bot. | bitter orange tree | naranjero agrio Citrus aurantium, vulgaris |
| bot. | bitter orange tree | naranjo amargo Citrus aurantium, vulgaris |
| agric. | bitter orange tree | naranjo amargo (Citrus aurantium) |
| agric. | bitter orange tree | naranjo agrio (Citrus aurantium) |
| chem. | bitter orange-flower oil | esencia de Neroli |
| agric. | bitter oranges | bigaradas |
| agric. | bitter oranges | naranjas amargas |
| nat.sc., agric. | bitter pignut | hicoria | jicoria amarga (Carya amara, Carya cordiformis) |
| nat.sc., agric. | bitter pit | manchas amargas |
| agric. | bitter pit | "bitter pit" |
| nat.sc., agric. | Bitter Pit | "bitter pit" |
| agric. | bitter pit | corazón amargo |
| agric. | bitter pit | moteado de las manzanas |
| nat.sc., agric. | Bitter Pit | corazón amargo |
| nat.sc., agric. | Bitter Pit | enfermedad suberosa |
| nat.sc., agric. | Bitter Pit | manchas amargas |
| nat.sc., agric. | bitter pit | enfermedad suberosa |
| med. | bitter plant poison | alcaloide |
| gen. | bitter plant poison | sustancia vegetal básica |
| environ. | bitter principle | sustancia amarga |
| bot. | bitter quassia | cuasia amarga Quassia amara |
| agric. | bitter rot | rot amargo |
| pest.contr. | bitter rot of apple | antracnosis de las manzanas Pezicula alba |
| pest.contr. | bitter rot of cherries | podredumbre amarga de la fruta Glomerella cingulata |
| nat.sc., agric. | bitter rot of cherry | podredumbre amarga de la fruta (Gloeosporium fructigenum, Glomerella cingulata) |
| agric. | bitter rot of cherry | podredumbre amarga de la cereza (Gloeosporium fructigenum, Glomerella cingulata) |
| chem. | bitter salt | sal amarga |
| agric. | bitter seed | semilla amarga |
| el. | Bitter solenoid | solenoide de discos |
| phys.sc. | bitter solenoid | solenoide en disco |
| el. | Bitter solenoid | bobina de Bitter |
| chem. | bitter spar | magnesita |
| chem. | bitter spar | dolomia |
| agric. | bitter substances | substancias amargas |
| bot. | bitter tamarind | tamarindo Tamarindus indica |
| food.ind. | bitter-tasting spirit drink or bitter | bebida espirituosa de sabor amargo, amer o bitter |
| agric. | bitter variety | variedad amarga |
| nat.sc., agric. | bitter vetch | alcaruna (Ervum ervilia, Vicia ervilia) |
| nat.sc., agric. | bitter vetch | almorta de los prados (Lathyrus pratensis L.) |
| nat.sc., agric. | bitter vetch | lenteja bastarda (Ervum ervilia, Vicia ervilia) |
| nat.sc., agric. | bitter vetch | lenteja yero (Ervum ervilia, Vicia ervilia) |
| nat.sc., agric. | bitter vetch | yero (Ervum ervilia, Vicia ervilia) |
| nat.sc., agric. | bitter vetch | alcarcena (Ervum ervilia, Vicia ervilia) |
| bot. | bitter vetch | yero Vicia ervilia, Ervum ervilia |
| agric. | bitter vetch | alcarceña (Ervum ervilia, Vicia ervilia) |
| bot. | bitter vetch | lenteja bastarda Vicia ervilia, Ervum ervilia |
| agric. | bitter vetch | alcaruña (Ervum ervilia, Vicia ervilia) |
| bot. | bitter vetch | alcarceña Vicia ervilia, Ervum ervilia |
| agric. | bitter white lupin | altramuz blanco amargo (Lupinus albus) |
| agric. | bitter white lupin seed | semilla de variedades amargas de altramuz blanco |
| agric. | bitter white lupin seed | semilla de altamuz blanco amargo |
| agric. | bitter wood | cuasia (Quassia amara) |
| bot. | hairy bitter vetch | guija velluda Lathyrus hirsutus |
| brew. | hop bitter | amargor del lúpulo |
| gen. | The smaller leaves of turnip greens are the least bitter | Las hojas mas pequeñas de los nabos silvestres son las menos amargas |