goony vs mollymawk

goony and mollymawk both are nouns.

Word	Noun	Adjective	Verb	Adverb
goony	Yes	No	No	No
mollymawk	Yes	No	No	No

As nouns, mollymawk is a hypernym of goony; that is, mollymawk is a word with a broader meaning than goony:

goony: a variety of albatross with black feet
mollymawk: large web-footed birds of the Southern Hemisphere having long narrow wings; noted for powerful gliding flight

Other hypernyms of goony include albatross.

goony (noun)	mollymawk (noun)
a variety of albatross with black feet	large web-footed birds of the Southern Hemisphere having long narrow wings; noted for powerful gliding flight