noisome
1. [ adjective ] causing or able to cause nausea
Synonyms: loathsome nauseous offensive sickening vile nauseating
Examples:

"a nauseating smell" "nauseous offal" "a sickening stench"

Related terms: unwholesome
2. [ adjective ] offensively malodorous
Synonyms: foul-smelling fetid foul stinking funky putrid smelly foetid
Examples:

"a putrid smell"

Related terms: malodorous
Similar spelling:   no-see-um