laver vs red algae

laver and red algae both are nouns.

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

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

laver: edible red seaweeds
red algae: marine algae in which the chlorophyll is masked by a red or purplish pigment; source of agar and carrageenan

laver (noun)	red algae (noun)
(Old Testament) large basin used by a priest in an ancient Jewish temple to perform ritual ablutions	marine algae in which the chlorophyll is masked by a red or purplish pigment; source of agar and carrageenan
seaweed with edible translucent crinkly green fronds
edible red seaweeds