| Subject | English | Spanish |
| forestr. | alpine blue-sow-thistle | cicerbita alpina |
| agric. | artichoke thistle | cardo de comer (Cynara cardunculus) |
| agric. | artichoke thistle | cardo comestible (Cynara cardunculus) |
| agric. | blessed thistle | cardo bendito (Cnicus benedictus) |
| agric. | blessed thistle | cardo santo (Cnicus benedictus) |
| bot. | blessed thistle | cardo santo Cnicus benedictus |
| nat.sc., agric. | blue thistle | viborera morada (Echium vulgare) |
| nat.sc., agric. | blue thistle | hierba azul (Echium vulgare) |
| nat.sc., agric. | bull thistle | cardo lanceolado (Carduus lanceolatus Hill, Cirsium vulgare Ten./Airy-Shaw) |
| nat.sc., agric. | bull thistle | cardo común (Cirsium lanceolatum, Cirsium vulgare) |
| nat.sc., agric. | bull thistle | cardo negro Arg. (Cirsium lanceolatum, Cirsium vulgare) |
| nat.sc., agric. | bull thistle | cardo de toro (Cirsium lanceolatum, Cirsium vulgare) |
| agric. | bull thistle | cardo negro (Cirsium lanceolatum) |
| nat.res. | Canada thistle | cardo cundidor (Cirsium arvense) |
| nat.res. | Canada thistle | cardo condidor (Cirsium arvense) |
| nat.res. | Canada thistle | cardo borriquero (Cirsium arvense) |
| nat.res. | Canada thistle | aprepunos burrero (Cirsium arvense) |
| agric. | Canada thistle | cardo burrero (Cirsium arvense) |
| agric. | Canada thistle | aprepuños burrero (Cirsium arvense) |
| agric. | carline thistle | cardo plateado (Carlina acaulis) |
| agric. | carline thistle | ajonjaro (Carlina acaulis) |
| agric. | corn thistle | cardo burrero (Cirsium arvense) |
| nat.sc., agric. | corn thistle | cardo borriquero (Cirsium arvense) |
| nat.sc., agric. | corn thistle | aprepunos burrero (Cirsium arvense) |
| nat.res. | corn thistle | cardo cundidor (Cirsium arvense) |
| nat.sc., agric. | corn thistle | cardo condidor (Cirsium arvense) |
| agric. | corn thistle | aprepuños burrero (Cirsium arvense) |
| nat.sc., agric. | cotton thistle | cardo gigante (Onopordum acanthium L.) |
| nat.sc., agric. | cotton thistle | cardo borriquero (Onopordum acanthium L.) |
| nat.sc., agric. | creeping thistle | cardo condidor (Cirsium arvense) |
| nat.res. | creeping thistle | cardo cundidor (Cirsium arvense) |
| nat.sc., agric. | creeping thistle | cardo borriquero (Cirsium arvense) |
| nat.sc., agric. | creeping thistle | aprepunos burrero (Cirsium arvense) |
| agric. | creeping thistle | cardo burrero (Cirsium arvense) |
| agric. | creeping thistle | aprepuños burrero (Cirsium arvense) |
| nat.sc., agric. | fuller's thistle | cardo lanceolado (Carduus lanceolatus Hill, Cirsium vulgare Ten./Airy-Shaw) |
| nat.sc., agric. | fuller's thistle | cardo común (Cirsium lanceolatum, Cirsium vulgare) |
| nat.sc., agric. | fuller's thistle | cardo de toro (Cirsium lanceolatum, Cirsium vulgare) |
| nat.sc., agric. | fuller's thistle | cardo negro Arg. (Cirsium lanceolatum, Cirsium vulgare) |
| agric. | fuller's thistle | cardo negro (Cirsium lanceolatum) |
| bot. | globe thistle | abadejo Echinops ritro |
| nat.sc., agric. | globe thistle | abadejo (Echinops ritro, Echinops ruthenicus) |
| nat.sc., agric. | globe thistle | cardo yesquero (Echinops ritro, Echinops ruthenicus) |
| bot. | globe thistle | cardo yesquero Echinops ritro |
| agric. | golden thistle | escolimo (Scolymus) |
| bot. | golden thistle | cardillos Scolymus hispanicus |
| entomol., Arg. | green sow-thistle aphid | pulgón rojo de la radicheta Uroleucon sonchi (L.) |
| nat.res. | holy thistle | cardo mariano (Silybum marianum) |
| bot. | holy thistle | cardo maría Silybum marianum |
| bot. | holy thistle | cardo lechal Silybum marianum |
| bot. | holy thistle | cardo santo Cnicus benedictus |
| bot. | lady's thistle | cardo lechal Silybum marianum |
| bot. | lady's thistle | cardo maría Silybum marianum |
| nat.sc., agric. | malt star thistle | flor del minero (Centaurea melitensis L.) |
| nat.sc., agric. | maltese thistle | flor del minero (Centaurea melitensis L.) |
| nat.sc., agric. | marsh thistle | cirsio palustre (Cirsium palustre) |
| nat.res. | milk thistle | cardo mariano (Silybum marianum) |
| agric. | milk thistle | cardo lechero (Silybum marianum) |
| bot. | milk thistle | cardo lechal Silybum marianum |
| agric. | milk thistle | arzolla (Silybum marianum) |
| agric. | milk thistle | cardo de María (Silybum marianum) |
| agric. | milk thistle | cardo asnal (Silybum marianum) |
| bot. | milk thistle | cardo maría Silybum marianum |
| nat.sc., agric. | musk thistle | cardo rojo (Carduus nutans L.) |
| nat.sc., agric. | musk thistle | cardo pendiente (Carduus nutans L.) |
| nat.sc., agric. | nodding thistle | cardo rojo (Carduus nutans L.) |
| nat.sc., agric. | nodding thistle | cardo pendiente (Carduus nutans L.) |
| nat.sc., agric. | purple star thistle | trepacaballos (Centaurea calcitrapa L.) |
| nat.sc., agric. | purple star thistle | cardo stellato (Centaurea calcitrapa L.) |
| nat.sc., agric. | red star thistle | cardo stellato (Centaurea calcitrapa L.) |
| nat.sc., agric. | red star thistle | trepacaballos (Centaurea calcitrapa L.) |
| bot. | Russian thistle | barrilla fina Salsola kali |
| bot. | Russian thistle | espinardo Salsola kali |
| nat.sc., agric. | Russian thistle | barrilla pinchosa (Salsola kali) |
| nat.sc., agric. | Russian thistle | caramillo (Salsola kali) |
| agric. | Russian thistle | cardo ruso (Salsola kali) |
| bot. | Russian thistle | salicor borde Salsola kali |
| bot. | Russian thistle | barrilla pinchosa Salsola kali |
| bot. | Russian thistle | pincho Salsola kali |
| nat.res. | saffron thistle | cardo lanudo (Carthamus lanatus L.) |
| nat.res. | scabious star thistle | gratabous (Centaurea scabiosa L.) |
| nat.sc., agric. | Scotch thistle | cardo gigante (Onopordum acanthium L.) |
| nat.sc., agric. | Scotch thistle | cardo borriquero (Onopordum acanthium L.) |
| entomol., Arg. | sow-thistle aphid | pulgón rojo de la radicheta Uroleucon sonchi (L.) |
| nat.sc., agric. | spear thistle | cardo lanceolado (Carduus lanceolatus Hill, Cirsium vulgare Ten./Airy-Shaw) |
| nat.sc., agric. | spear thistle | cardo negro Arg. (Cirsium lanceolatum, Cirsium vulgare) |
| nat.sc., agric. | spear thistle | cardo de toro (Cirsium lanceolatum, Cirsium vulgare) |
| agric. | spear thistle | cardo negro (Cirsium lanceolatum) |
| nat.sc., agric. | spear thistle | cardo común (Cirsium lanceolatum, Cirsium vulgare) |
| nat.sc., agric. | star thistle | trepacaballos (Centaurea calcitrapa) |
| bot. | star thistle | trepacaballos Centaurea calcitrappa |
| nat.sc., agric. | star thistle | cardo estrellado (Centaurea calcitrapa) |
| bot. | star thistle | cardo estrellado Centaurea calcitrappa |
| nat.res. | St.Barnaby's Thistle | abrepuno amarillo (Centaurea solstitialis L.) |
| nat.res. | St.Barnaby's Thistle | abremanos (Centaurea solstitialis L.) |
| industr., construct. | to tease cloth with worn fuller thistles | cardar un paño con cardenchas |
| nat.sc., agric. | thistle aphid | áfido (Anuraphis cardui, Brachycaudus cardui) |
| nat.sc., agric. | thistle aphid | pulgón del cardo (Anuraphis cardui, Brachycaudus cardui) |
| entomol. | thistle aphid | pulgón del cardo Brachycaudus cardui |
| nat.res. | thistle butterfly | vanesa de la alcachofa (Cynthia cardui, Pyrameis cardui, Vanessa cardui) |
| entomol. | thistle butterfly | vanesa de la alcachofa Pyrameis cardui |
| gen. | thistle extirpators hand tools | escardadoras |
| chem. | thistle funnel | tubo de seguridad |
| agric. | thistle spud | escardillo |
| agric. | thistle spud | arrancador de malas hierbas |
| agric. | thistle weeding | descardado |
| agric. | thistle weeding | arrancamiento de los cardos |
| nat.sc., agric. | water thistle | cirsium oleraceum (Cirsium oleraceum) |
| agric. | water thistle | cirsio oleráceo (Cirsium oleraceum) |
| nat.res. | yellow star thistle | abrepuno amarillo (Centaurea solstitialis L.) |
| nat.res. | yellow star thistle | abremanos (Centaurea solstitialis L.) |