suborder Clamatores vs Passeriformes

suborder Clamatores and Passeriformes both are nouns.

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

suborder Clamatores (noun)	Passeriformes (noun)
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	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