archespore vs archesporium

archespore and archesporium both are nouns.

Word	Noun	Adjective	Verb	Adverb
archespore	Yes	No	No	No
archesporium	Yes	No	No	No

As nouns, archespore and archesporium are synonyms defined as:

archespore and archesporium: primitive cell or group of cells from which a mother cell develops

archespore (noun)	archesporium (noun)
primitive cell or group of cells from which a mother cell develops	primitive cell or group of cells from which a mother cell develops