Ornithopoda vs suborder Ornithopoda

Ornithopoda and suborder Ornithopoda both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ornithopoda	Yes	No	No	No
suborder Ornithopoda	Yes	No	No	No

As nouns, Ornithopoda and suborder Ornithopoda are synonyms defined as:

Ornithopoda and suborder Ornithopoda: widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)

Other synonyms of Ornithopoda include euronithopod, Euronithopoda, suborder Euronithopoda.

Ornithopoda (noun)	suborder Ornithopoda (noun)
widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)	widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)