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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Involuntary reaction:

KNEEJERK: Involuntary reaction
TIC: Involuntary reaction.
KNEEJERKS: Involuntary reactions
REFLEXES: Involuntary reactions
REFLEX: Involuntary, as a reaction