egression vs emanation

egression and emanation both are nouns.

Word	Noun	Adjective	Verb	Adverb
egression	Yes	No	No	No
emanation	Yes	No	No	No

As nouns, emanation is a hyponym of egression; that is, emanation is a word with a more specific, narrower meaning than egression:

Other hyponyms of egression include surfacing, emission.

egression (noun)	emanation (noun)
the act of coming (or going) out; becoming apparent	the act of emitting; causing to flow forth
	(theology) the origination of the Holy Spirit at Pentecost
	something that is emitted or radiated (as a gas or an odor or a light, etc.)