order Passeriformes vs suborder Clamatores

order Passeriformes and suborder Clamatores both are nouns.

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

order Passeriformes (noun)	suborder 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