garden truck vs veggie

garden truck and veggie both are nouns.

Word	Noun	Adjective	Verb	Adverb
garden truck	Yes	No	No	No
veggie	Yes	No	No	No

As nouns, veggie is a hyponym of garden truck; that is, veggie is a word with a more specific, narrower meaning than garden truck:

garden truck: fresh fruits and vegetable grown for the market
veggie: edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant

Other hyponyms of garden truck include edible fruit, veg, vegetable, eater.

garden truck (noun)	veggie (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