germination vs inception

germination and inception both are nouns.

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

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

germination: the origin of some development
inception: an event that is a beginning; a first part or stage of subsequent events

Other hypernyms of germination include origin, origination.

germination (noun)	inception (noun)
the origin of some development	an event that is a beginning; a first part or stage of subsequent events
the process whereby seeds or spores sprout and begin to grow