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Synonyms for Dummy (same or very similar meaning)

WordNet sense 1 (a person who does not talk):
silent person

WordNet sense 2 (an ignorant or foolish person):
booby, dope, dumbbell, pinhead

WordNet sense 3 (a cartridge containing an explosive charge but no bullet):
blank, blank shell

WordNet sense 4 (contrived by art rather than nature):
artificial, unreal

WordNet sense 5 (make a dummy of):
dummy up


From the ODE community, based on WordNetadd/edit