darter vs anhinga

darter and anhinga both are nouns.

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

As nouns, darter and anhinga are synonyms defined as:

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

Other synonyms of darter include snakebird.

darter (noun)	anhinga (noun)
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
fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill