[adj] injurious to physical or mental health; "noxious chemical wastes"; "noxious ideas"
baneful, corrupting, deadly, degrading, harmful, pernicious, pestilent, vesicant, vesicatory
harmless, innocuous
abhorrent, abominable, bad, bad for, bad-smelling, baleful, baneful, barfy, base, beastly, below contempt, beneath contempt, bitchy, brackish, catching, cloying, communicable, contagious, contaminated, contemptible, corroding, corrosive, corrupting, corru