inception vs procession

inception and procession both are nouns.

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

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

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

Other hyponyms of inception include germination, cause, overture, preliminary, prelude, emanation, rise.

inception (noun)	procession (noun)
an event that is a beginning; a first part or stage of subsequent events	the group action of a collection of people or animals or vehicles moving ahead in more or less regular formation
	the act of moving forward (as toward a goal)
	(theology) the origination of the Holy Spirit at Pentecost