anapsid reptile vs anapsid

anapsid reptile and anapsid both are nouns.

Word	Noun	Adjective	Verb	Adverb
anapsid reptile	Yes	No	No	No
anapsid	Yes	No	No	No

As nouns, anapsid reptile and anapsid are synonyms defined as:

anapsid reptile and anapsid: primitive reptile having no opening in the temporal region of the skull; all extinct except turtles

anapsid reptile (noun)	anapsid (noun)
primitive reptile having no opening in the temporal region of the skull; all extinct except turtles	primitive reptile having no opening in the temporal region of the skull; all extinct except turtles