emanation vs inception

emanation and inception both are nouns.

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

As nouns, inception is a hypernym of emanation; that is, inception is a word with a broader meaning than emanation:

emanation: (theology) the origination of the Holy Spirit at Pentecost
inception: an event that is a beginning; a first part or stage of subsequent events

Other hypernyms of emanation include origin, origination.

emanation (noun)	inception (noun)
the act of emitting; causing to flow forth	an event that is a beginning; a first part or stage of subsequent events
(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.)