laver vs green algae

laver and green algae both are nouns.

Word	Noun	Adjective	Verb	Adverb
laver	Yes	No	No	No
green algae	Yes	No	No	No

As nouns, green algae is a hypernym of laver; that is, green algae is a word with a broader meaning than laver:

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

Other hypernyms of laver include chlorophyte.

laver (noun)	green algae (noun)
(Old Testament) large basin used by a priest in an ancient Jewish temple to perform ritual ablutions	algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water
seaweed with edible translucent crinkly green fronds
edible red seaweeds