Ictodosauria vs order Ictodosauria

Ictodosauria and order Ictodosauria both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ictodosauria	Yes	No	No	No
order Ictodosauria	Yes	No	No	No

As nouns, Ictodosauria and order Ictodosauria are synonyms defined as:

Ictodosauria and order Ictodosauria: extinct reptiles of the later Triassic period

Ictodosauria (noun)	order Ictodosauria (noun)
extinct reptiles of the later Triassic period	extinct reptiles of the later Triassic period