green groceries vs veg

green groceries and veg both are nouns.

Word	Noun	Adjective	Verb	Adverb
green groceries	Yes	No	No	No
veg	Yes	No	No	No

As nouns, veg is a hyponym of green groceries; that is, veg is a word with a more specific, narrower meaning than green groceries:

green groceries: fresh fruits and vegetable grown for the market
veg: edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant

Other hyponyms of green groceries include edible fruit, vegetable, veggie, eater.

green groceries (noun)	veg (noun)
fresh fruits and vegetable grown for the market	edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant