Pernis vs genus Pernis

Pernis and genus Pernis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pernis	Yes	No	No	No
genus Pernis	Yes	No	No	No

As nouns, Pernis and genus Pernis are synonyms defined as:

Pernis and genus Pernis: a common European bird of prey; dull brown with white-streaked underparts

Pernis (noun)	genus Pernis (noun)
a common European bird of prey; dull brown with white-streaked underparts	a common European bird of prey; dull brown with white-streaked underparts