potherb vs veggie

potherb and veggie both are nouns.

Word	Noun	Adjective	Verb	Adverb
potherb	Yes	No	No	No
veggie	Yes	No	No	No

As nouns, veggie is a hypernym of potherb; that is, veggie is a word with a broader meaning than potherb:

potherb: any of various herbaceous plants whose leaves or stems or flowers are cooked and used for food or seasoning
veggie: edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant

Other hypernyms of potherb include veg, vegetable.

potherb (noun)	veggie (noun)
any of various herbaceous plants whose leaves or stems or flowers are cooked and used for food or seasoning	edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant