pseudopodium vs pseudopod

pseudopodium and pseudopod both are nouns.

Word	Noun	Adjective	Verb	Adverb
pseudopodium	Yes	No	No	No
pseudopod	Yes	No	No	No

As nouns, pseudopodium and pseudopod are synonyms defined as:

pseudopodium and pseudopod: temporary outgrowth used by some microorganisms as an organ of feeding or locomotion

pseudopodium (noun)	pseudopod (noun)
temporary outgrowth used by some microorganisms as an organ of feeding or locomotion	temporary outgrowth used by some microorganisms as an organ of feeding or locomotion