rhizopod vs foraminifer

rhizopod and foraminifer both are nouns.

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

As nouns, foraminifer is a hyponym of rhizopod; that is, foraminifer is a word with a more specific, narrower meaning than rhizopod:

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

Other hyponyms of rhizopod include ameba, amoeba, foram, testacean.

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