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bird vs bird of passage bird of passage vs bird

bird and bird of passage both are nouns.

bird is a verb but bird of passage is not a verb.

As nouns, bird of passage is a hyponym of bird; that is, bird of passage is a word with a more specific, narrower meaning than bird and bird of passage is a type of bird with the definitions:
  • warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
bird (noun) bird of passage (noun)
warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings someone who leads a wandering unsettled life
the flesh of a bird or fowl (wild or domestic) used as food any bird that migrates seasonally
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) bird of passage (verb)
watch and study birds in their natural habitat