sea lettuce vs chlorophyte

sea lettuce and chlorophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea lettuce	Yes	No	No	No
chlorophyte	Yes	No	No	No

As nouns, chlorophyte is a hypernym of sea lettuce; that is, chlorophyte is a word with a broader meaning than sea lettuce:

sea lettuce: seaweed with edible translucent crinkly green fronds
chlorophyte: algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water

Other hypernyms of sea lettuce include green algae.

sea lettuce (noun)	chlorophyte (noun)
seaweed with edible translucent crinkly green fronds	algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water