desmid vs green algae

desmid and green algae both are nouns.

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

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

desmid: freshwater green algae
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 desmid include chlorophyte.

desmid (noun)	green algae (noun)
freshwater green algae	algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water