jumping-off point vs springboard

jumping-off point and springboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
jumping-off point	Yes	No	No	No
springboard	Yes	No	No	No

As nouns, jumping-off point and springboard are synonyms defined as:

jumping-off point and springboard: a beginning from which an enterprise is launched

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

jumping-off point (noun)	springboard (noun)
a beginning from which an enterprise is launched	a beginning from which an enterprise is launched
	a flexible board for jumping upward