snakebird vs darter

snakebird and darter both are nouns.

Word	Noun	Adjective	Verb	Adverb
snakebird	Yes	No	No	No
darter	Yes	No	No	No

As nouns, snakebird and darter are synonyms defined as:

snakebird and darter: fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill

Other synonyms of snakebird include anhinga.

snakebird (noun)	darter (noun)
fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill	a person or other animal that moves abruptly and rapidly
	fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill