emergence vs emersion

emergence and emersion both are nouns.

Word	Noun	Adjective	Verb	Adverb
emergence	Yes	No	No	No
emersion	Yes	No	No	No

As nouns, emergence and emersion are synonyms defined as:

emergence (noun)	emersion (noun)
the act of coming (or going) out; becoming apparent	the act of emerging
the act of emerging	(astronomy) the reappearance of a celestial body after an eclipse
the becoming visible
the gradual beginning or coming forth