egress vs emersion

egress and emersion both are nouns.

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

As nouns, egress and emersion are synonyms defined as:

egress and emersion: (astronomy) the reappearance of a celestial body after an eclipse

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

egress (verb)	emersion (verb)
come out of