incipiency vs beginning

incipiency and beginning both are nouns.

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

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

Other hypernyms of incipiency include commencement, first, get-go, kickoff, offset, outset, showtime, start, starting time.

incipiency (noun)	beginning (noun)
beginning to exist or to be apparent	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

incipiency (adjective)	beginning (adjective)
	serving to begin