megaspore vs macrospore

megaspore and macrospore both are nouns.

Word	Noun	Adjective	Verb	Adverb
megaspore	Yes	No	No	No
macrospore	Yes	No	No	No

As nouns, megaspore and macrospore are synonyms defined as:

megaspore and macrospore: larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte

megaspore (noun)	macrospore (noun)
larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte	larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte