Nausea :: Nausea (n.) Seasickness; hence, any similar sickness of the stomach accompanied with a propensity to vomit; qualm; squeamishness of the stomach; loathing..
Nauseant :: Nauseant (n.) A substance which produces nausea.
Nauseate :: Nauseate (v. i.) To become squeamish; to feel nausea; to turn away with disgust.
Nauseate :: Nauseate (v. t.) To affect with nausea; to sicken; to cause to feel loathing or disgust.
Nauseate :: Nauseate (v. t.) To sicken at; to reject with disgust; to loathe.