jungle cock vs jungle fowl

jungle cock and jungle fowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
jungle cock	Yes	No	No	No
jungle fowl	Yes	No	No	No

As nouns, jungle fowl is a hypernym of jungle cock; that is, jungle fowl is a word with a broader meaning than jungle cock:

jungle cock: male jungle fowl
jungle fowl: small Asiatic wild bird; believed to be ancestral to domestic fowl

Other hypernyms of jungle cock include gallina.

jungle cock (noun)	jungle fowl (noun)
male jungle fowl	small Asiatic wild bird; believed to be ancestral to domestic fowl