Below are possible answers for the crossword clue Caustic.
4 letter answer(s) to caustic
ACID
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
being sour to the taste
harsh or corrosive in tone;
having the characteristics of an acid; "an acid reaction"
street name for lysergic acid diethylamide
5 letter answer(s) to caustic
ACRID
bitter
harsh or corrosive in tone;
strong and sharp;"the pungent taste of radishes"; "the acrid smell of burning rubber"
SNIDE
expressive of contempt; "curled his lip in a supercilious smile"; "spoke in a sneering jeering manner"; "makes many a sharp comparison but never a mean or snide one"
7 letter answer(s) to caustic
MORDANT
A musical ornament
a substance used to treat leather or other materials before dyeing; aids in dyeing process
harshly ironic or sinister; "black humor"; "a grim joke"; "grim laughter"; "fun ranging from slapstick clowning ... to savage mordant wit"
of a substance, especially a strong acid; capable of destroying or eating away by chemical action
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