raptor vs bird of prey

raptor and bird of prey both are nouns.

Word	Noun	Adjective	Verb	Adverb
raptor	Yes	No	No	No
bird of prey	Yes	No	No	No

As nouns, raptor and bird of prey are synonyms defined as:

raptor and bird of prey: any of numerous carnivorous birds that hunt and kill other animals

Other synonyms of raptor include raptorial bird.

raptor (noun)	bird of prey (noun)
any of numerous carnivorous birds that hunt and kill other animals	any of numerous carnivorous birds that hunt and kill other animals