rhizopodan vs ameba

rhizopodan and ameba both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhizopodan	Yes	No	No	No
ameba	Yes	No	No	No

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

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

Other hyponyms of rhizopodan include amoeba, foram, foraminifer, testacean.

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