macrospore vs megaspore

macrospore and megaspore both are nouns.

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

As nouns, macrospore and megaspore are synonyms defined as:

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

macrospore (noun)	megaspore (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