peafowl vs peacock

peafowl and peacock both are nouns.

Word	Noun	Adjective	Verb	Adverb
peafowl	Yes	No	No	No
peacock	Yes	No	No	No

As nouns, peacock is a hyponym of peafowl; that is, peacock is a word with a more specific, narrower meaning than peafowl:

peafowl: very large terrestrial southeast Asian pheasant often raised as an ornamental bird
peacock: male peafowl; having a crested head and very large fanlike tail marked with iridescent eyes or spots

Other hyponyms of peafowl include pea-chick, peachick, peahen, blue peafowl, Pavo cristatus, green peafowl, Pavo muticus.

peafowl (noun)	peacock (noun)
very large terrestrial southeast Asian pheasant often raised as an ornamental bird	male peafowl; having a crested head and very large fanlike tail marked with iridescent eyes or spots
	European butterfly having reddish-brown wings each marked with a purple eyespot