therapsid vs synapsid

therapsid and synapsid both are nouns.

Word	Noun	Adjective	Verb	Adverb
therapsid	Yes	No	No	No
synapsid	Yes	No	No	No

As nouns, synapsid is a hypernym of therapsid; that is, synapsid is a word with a broader meaning than therapsid:

therapsid: probably warm-blooded; considered direct ancestor of mammals
synapsid: extinct reptile having a single pair of lateral temporal openings in the skull

Other hypernyms of therapsid include synapsid reptile.

therapsid (noun)	synapsid (noun)
probably warm-blooded; considered direct ancestor of mammals	extinct reptile having a single pair of lateral temporal openings in the skull