"acrid" in the adjective sense
1. pungent, acrid
strong and sharp
"the pungent taste of radishes"
"the acrid smell of burning rubber"
2. acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic
harsh or corrosive in tone
"an acerbic tone piercing otherwise flowery prose"
"a barrage of acid comments"
"her acrid remarks make her many enemies"
"bitter words"
"blistering criticism"
"caustic jokes about political assassination, talk-show hosts and medical ethics"
"a sulfurous denunciation"
"a vitriolic critique"
Source: WordNet® (An amazing lexical database of English)
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