Gallus gallus vs cock

Gallus gallus and cock both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gallus gallus	Yes	No	No	No
cock	Yes	No	Yes	No

As nouns, cock is a hyponym of Gallus gallus; that is, cock is a word with a more specific, narrower meaning than Gallus gallus:

Gallus gallus: a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl
cock: adult male chicken

Other hyponyms of Gallus gallus include biddy, chick, rooster, capon, biddy, hen, spring chicken, Rhode Island red, Dominick, Dominique, Orpington.

Gallus gallus (noun)	cock (noun)
a jungle fowl of southeastern Asia that is considered ancestral to the domestic fowl	adult male bird
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl	adult male chicken
	faucet consisting of a rotating device for regulating flow of a liquid
	the part of a gunlock that strikes the percussion cap when the trigger is pulled
	obscene terms for penis

Gallus gallus (verb)	cock (verb)
	set the trigger of a firearm back for firing
	to walk with a lofty proud gait, often in an attempt to impress others
	tilt or slant to one side