"acid" in the noun sense
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
2. acid, back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen
street name for lysergic acid diethylamide
"acid" in the adjective sense
1. 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"
"caustic jokes about political assassination, talk-show hosts and medical ethics"
"a sulfurous denunciation"
"a vitriolic critique"
2. acidic, acid, acidulent, acidulous
being sour to the taste
having the characteristics of an acid
"an acid reaction"
Source: WordNet® (An amazing lexical database of English)
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