inception vs beginning

inception and beginning both are nouns.

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

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

inception: an event that is a beginning; a first part or stage of subsequent events
beginning: the event consisting of the start of something

inception (noun)	beginning (noun)
an event that is a beginning; a first part or stage of subsequent events	the act of starting something
	the first part or section of something
	the event consisting of the start of something
	the place where something begins, where it springs into being
	the time at which something is supposed to begin

inception (adjective)	beginning (adjective)
	serving to begin