tomato vs herbaceous plant

tomato and herbaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
tomato	Yes	No	No	No
herbaceous plant	Yes	No	No	No

As nouns, herbaceous plant is a hypernym of tomato; that is, herbaceous plant is a word with a broader meaning than tomato:

tomato: native to South America; widely cultivated in many varieties
herbaceous plant: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Other hypernyms of tomato include herb.

tomato (noun)	herbaceous plant (noun)
mildly acid red or yellow pulpy fruit eaten as a vegetable	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
native to South America; widely cultivated in many varieties