order Passeriformes vs suborder Oscines

order Passeriformes and suborder Oscines both are nouns.

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

order Passeriformes (noun)	suborder Oscines (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