- nauseating, nauseous, noisome, loathsome, offensive, sickening, vile - causing or able to cause nausea; "a nauseating smell"; "nauseous offal"; "a sickening stench"
Antonym: wholesome (indirect, via unwholesome)
- fetid, foetid, foul, foul-smelling, funky, noisome, smelly, putrid, stinking - offensively malodorous; "a putrid smell"
Antonym: fragrant (indirect, via malodorous)