starting point vs get-go

starting point and get-go both are nouns.

Word	Noun	Adjective	Verb	Adverb
starting point	Yes	No	No	No
get-go	Yes	No	No	No

As nouns, get-go is a hypernym of starting point; that is, get-go is a word with a broader meaning than starting point:

Other hypernyms of starting point include beginning, commencement, first, kickoff, offset, outset, showtime, start, starting time.

starting point (noun)	get-go (noun)
earliest limiting point	the time at which something is supposed to begin