foraminifer vs rhizopod

foraminifer and rhizopod both are nouns.

Word	Noun	Adjective	Verb	Adverb
foraminifer	Yes	No	No	No
rhizopod	Yes	No	No	No

As nouns, rhizopod is a hypernym of foraminifer; that is, rhizopod is a word with a broader meaning than foraminifer:

foraminifer: marine microorganism having a calcareous shell with openings where pseudopods protrude
rhizopod: protozoa characterized by a pseudopod

Other hypernyms of foraminifer include rhizopodan.

foraminifer (noun)	rhizopod (noun)
marine microorganism having a calcareous shell with openings where pseudopods protrude	protozoa characterized by a pseudopod