saurischian vs saurischian dinosaur

saurischian and saurischian dinosaur both are nouns.

Word	Noun	Adjective	Verb	Adverb
saurischian	Yes	No	No	No
saurischian dinosaur	Yes	No	No	No

As nouns, saurischian and saurischian dinosaur are synonyms defined as:

saurischian and saurischian dinosaur: herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile

saurischian (noun)	saurischian dinosaur (noun)
herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile	herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile