Example : A nauseating smell.
Nauseous offal.
A sickening stench.

Synonyms : nauseating, nauseous, noisome, offensive, queasy, sickening, vile

Example : A disgusting smell.
Distasteful language.
A loathsome disease.
The idea of eating meat is repellent to me.
Revolting food.
A wicked stench.

Synonyms : disgustful, disgusting, distasteful, foul, loathly, repellant, repellent, repelling, revolting, skanky, wicked, yucky