order Passeriformes vs suborder Passeres

order Passeriformes and suborder Passeres both are nouns.

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

order Passeriformes (noun)	suborder Passeres (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	two names for the suborder of typical songbirds