cruciferous vegetable vs veg

cruciferous vegetable and veg both are nouns.

Word	Noun	Adjective	Verb	Adverb
cruciferous vegetable	Yes	No	No	No
veg	Yes	No	No	No

As nouns, veg is a hypernym of cruciferous vegetable; that is, veg is a word with a broader meaning than cruciferous vegetable:

cruciferous vegetable: a vegetable of the mustard family: especially mustard greens, various cabbages, broccoli, cauliflower, brussels sprouts
veg: edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant

Other hypernyms of cruciferous vegetable include vegetable, veggie.

cruciferous vegetable (noun)	veg (noun)
a vegetable of the mustard family: especially mustard greens, various cabbages, broccoli, cauliflower, brussels sprouts	edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant