| Subject | English | Finnish |
| mun.plan., earth.sc. | air diffuser | ilmanjakolaite |
| mech.eng. | annular diffuser | rengasdiffuusori |
| mun.plan., earth.sc. | ceiling diffuser | kattoilmanjakolaite |
| mech.eng., construct. | compression diffuser | puristusmuhvi |
| mech.eng., construct. | compression diffuser | puristuskytkin |
| transp., mech.eng. | compressor diffuser | ahtimen diffuusori |
| industr., construct. | continuous diffuser | vuopesuri |
| earth.sc., transp. | diffuser buzz | diffuusorisurina |
| environ. | diffuser head | jakopää |
| environ. | diffuser head | jakelupää |
| earth.sc., mech.eng. | diffuser loss | diffuusorihäviö |
| mater.sc. | diffuser nozzle | sumusuihkuputki |
| mater.sc. | diffuser nozzle | hajasuihkuputki |
| mech.eng. | diffuser segment | ahdinkammio |
| mater.sc. | diffuser spray nozzle | hajasuihkuputki |
| mater.sc. | diffuser spray nozzle | sumusuihkuputki |
| earth.sc. | diffuser tunnel | diffuusorituulitunneli |
| transp. | diffuser vane | diffuusoriläppä |
| mech.eng., construct. | diffuser vanes | diffuusori |
| transp. | dump diffuser | jarrudiffuusori |
| mech.eng., construct. | egg crate diffuser | valosäleikkö |
| mech.eng., construct. | egg crate diffuser | valaistusritilä |
| agric., mater.sc. | exchanger-diffuser | diffuusiolaite |
| commun. | information diffuser | datahajautin |
| industr., construct. | light diffuser | nestekidepaneeli |
| earth.sc., el. | light diffuser | hajotin |
| patents. | light diffusers | valon hajottimet |
| mech.eng., construct. | lighting diffuser | heijastin |
| earth.sc. | perfect reflecting diffuser | täydellinen hajaheijastin |
| earth.sc. | perfect transmitting diffuser | täydellinen hajaläpäisin |
| mun.plan., earth.sc. | slot diffuser | rakodiffuusori |
| health. | sound diffuser | diffuusori |
| agric., mater.sc. | spray diffuser | sumusuutin |
| earth.sc. | subsonic diffuser | alisooninen diffuusori |
| earth.sc. | supersonic diffuser | ylisooninen diffuusori |
| earth.sc. | uniform diffuser | tasahajotin |
| energ.ind., mech.eng. | wind turbine with flapped ring wing diffuser | tuuliturbiini laipparengashajottimella |