Passeriformes vs Clamatores

Passeriformes and Clamatores both are nouns.

Word	Noun	Adjective	Verb	Adverb
Passeriformes	Yes	No	No	No
Clamatores	Yes	No	No	No

Passeriformes (noun)	Clamatores (noun)
largest order of birds comprising about half the known species: rooks, finches, sparrows, tits, warblers, robins, wrens, swallows, etc.; the four suborders are Eurylaimi, Tyranni, Menurae and Oscines or Passeres	used in some classification systems; a suborder or superfamily nearly coextensive with suborder Tyranni; Passeriformes having relatively simple vocal organs and little power of song; clamatorial birds