antepenultima vs antepenultimate

antepenultima and antepenultimate both are nouns.

Word	Noun	Adjective	Verb	Adverb
antepenultima	Yes	No	No	No
antepenultimate	Yes	Yes	No	No

As nouns, antepenultima and antepenultimate are synonyms defined as:

antepenultima and antepenultimate: the 3rd syllable of a word counting back from the end

Other synonyms of antepenultima include antepenult.

antepenultima (noun)	antepenultimate (noun)
the 3rd syllable of a word counting back from the end	the 3rd syllable of a word counting back from the end

antepenultima (adjective)	antepenultimate (adjective)
	third from last