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bird vs boo boo vs bird

bird and boo both are nouns.

bird and boo both are verbs.

As nouns, bird and boo are synonyms with the definitions:
  • a cry or noise made to express displeasure or contempt
Other synonyms of bird include raspberry, hiss, razz, razzing, hoot, snort, Bronx cheer.
bird (noun) boo (noun)
warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings a cry or noise made to express displeasure or contempt
the flesh of a bird or fowl (wild or domestic) used as food
informal terms for a (young) woman
a cry or noise made to express displeasure or contempt
badminton equipment consisting of a ball of cork or rubber with a crown of feathers
bird (verb) boo (verb)
watch and study birds in their natural habitat show displeasure, as after a performance or speech