Synonyms of 'foul'
- dirty, fetid, filthy, funky (slang), malodorous, nauseating, putrid, repulsive, scuzzy (slang), squalid, stinking, unclean
- obscene, abusive, blue, coarse, indecent, lewd, profane, scurrilous, vulgar
- offensive, abhorrent, despicable, detestable, disgraceful, lousy (slang), scandalous, scuzzy (slang), shameful, wicked
- unfair, crooked, dishonest, fraudulent, shady (informal), underhand, unscrupulous
Thesaurus for foul from the Collins American English Thesaurus
If you describe something as foul , you mean it is dirty and smells or tastes unpleasant.