ophidian vs serpent

ophidian and serpent both are nouns.

Word	Noun	Adjective	Verb	Adverb
ophidian	Yes	No	No	No
serpent	Yes	No	No	No

As nouns, ophidian and serpent are synonyms defined as:

ophidian and serpent: limbless scaly elongate reptile; some are venomous

Other synonyms of ophidian include snake.

ophidian (noun)	serpent (noun)
limbless scaly elongate reptile; some are venomous	limbless scaly elongate reptile; some are venomous
	an obsolete bass cornet; resembles a snake
	a firework that moves in serpentine manner when ignited