lamb roast vs gigot

lamb roast and gigot both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamb roast	Yes	No	No	No
gigot	Yes	No	No	No

As nouns, gigot is a hyponym of lamb roast; that is, gigot is a word with a more specific, narrower meaning than lamb roast:

Other hyponyms of lamb roast include crown roast, rack of lamb, leg of lamb.

lamb roast (noun)	gigot (noun)
a cut of lamb suitable for roasting	lamb leg suitable for roasting