goldcrest vs kinglet

goldcrest and kinglet both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldcrest	Yes	No	No	No
kinglet	Yes	No	No	No

As nouns, kinglet is a hypernym of goldcrest; that is, kinglet is a word with a broader meaning than goldcrest:

goldcrest: European kinglet with a black-bordered yellow crown patch
kinglet: small birds resembling warblers but having some of the habits of titmice

goldcrest (noun)	kinglet (noun)
European kinglet with a black-bordered yellow crown patch	small birds resembling warblers but having some of the habits of titmice