Elodea vs liliopsid genus

Elodea and liliopsid genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Elodea	Yes	No	No	No
liliopsid genus	Yes	No	No	No

As nouns, liliopsid genus is a hypernym of Elodea; that is, liliopsid genus is a word with a broader meaning than Elodea:

Elodea: submerged freshwater perennials
liliopsid genus: genus of flowering plants having a single cotyledon (embryonic leaf) in the seed

Other hypernyms of Elodea include monocot genus.

Elodea (noun)	liliopsid genus (noun)
submerged freshwater perennials	genus of flowering plants having a single cotyledon (embryonic leaf) in the seed