polymastigote vs mastigophore

polymastigote and mastigophore both are nouns.

Word	Noun	Adjective	Verb	Adverb
polymastigote	Yes	No	No	No
mastigophore	Yes	No	No	No

As nouns, mastigophore is a hypernym of polymastigote; that is, mastigophore is a word with a broader meaning than polymastigote:

polymastigote: flagellates with several flagella
mastigophore: a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals

Other hypernyms of polymastigote include flagellate, flagellate protozoan, flagellated protozoan, mastigophoran.

polymastigote (noun)	mastigophore (noun)
flagellates with several flagella	a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals