green-winged teal vs greenwing

green-winged teal and greenwing both are nouns.

Word	Noun	Adjective	Verb	Adverb
green-winged teal	Yes	No	No	No
greenwing	Yes	No	No	No

As nouns, green-winged teal and greenwing are synonyms defined as:

green-winged teal and greenwing: common teal of Eurasia and North America

Other synonyms of green-winged teal include Anas crecca.

green-winged teal (noun)	greenwing (noun)
common teal of Eurasia and North America	common teal of Eurasia and North America