rhizopod vs amoeba

rhizopod and amoeba both are nouns.

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

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

rhizopod: protozoa characterized by a pseudopod
amoeba: naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion

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

rhizopod (noun)	amoeba (noun)
protozoa characterized by a pseudopod	naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion