kickoff vs incipiency

kickoff and incipiency both are nouns.

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

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

Other hyponyms of kickoff include birth, incipience, starting point, terminus a quo, threshold.

kickoff (noun)	incipiency (noun)
(football) a kick from the center of the field to start a football game or to resume it after a score	beginning to exist or to be apparent
a start given to contestants
the time at which something is supposed to begin