origination vs inception

origination and inception both are nouns.

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

As nouns, origination and inception are synonyms defined as:

origination and inception: an event that is a beginning; a first part or stage of subsequent events

Other synonyms of origination include origin.

origination (noun)	inception (noun)
the act of starting something for the first time; introducing something new	an event that is a beginning; a first part or stage of subsequent events
an event that is a beginning; a first part or stage of subsequent events