point of departure vs springboard

point of departure and springboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
point of departure	Yes	No	No	No
springboard	Yes	No	No	No

As nouns, point of departure and springboard are synonyms defined as:

point of departure and springboard: a beginning from which an enterprise is launched

Other synonyms of point of departure include jumping-off point.

point of departure (noun)	springboard (noun)
a beginning from which an enterprise is launched	a beginning from which an enterprise is launched
a place from which an enterprise or expedition is launched	a flexible board for jumping upward