outset vs kickoff

outset and kickoff both are nouns.

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

As nouns, outset and kickoff are synonyms defined as:

Other synonyms of outset include beginning, commencement, first, get-go, offset, showtime, start, starting time.

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