giant squid vs squid

giant squid and squid both are nouns.

Word	Noun	Adjective	Verb	Adverb
giant squid	Yes	No	No	No
squid	Yes	No	No	No

As nouns, squid is a hypernym of giant squid; that is, squid is a word with a broader meaning than giant squid:

giant squid: largest mollusk known about but never seen (to 60 feet long)
squid: widely distributed fast-moving ten-armed cephalopod mollusk having a long tapered body with triangular tail fins

giant squid (noun)	squid (noun)
largest mollusk known about but never seen (to 60 feet long)	widely distributed fast-moving ten-armed cephalopod mollusk having a long tapered body with triangular tail fins
	(Italian cuisine) squid prepared as food