bump vs jounce

bump and jounce both are nouns.

Word	Noun	Adjective	Verb	Adverb
bump	Yes	No	Yes	No
jounce	Yes	No	Yes	No

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

Other hyponyms of bump include jar, jolt, shock, concussion, rap, strike, tap, bang, bash, belt, knock, smash, buffeting, pounding, sideswipe, slap, smack.

bump (noun)	jounce (noun)
an impact (as from a collision)	a sudden jarring impact
something that bulges out or is protuberant or projects from its surroundings
a lump on the body caused by a blow

bump (verb)	jounce (verb)
knock against with force or violence	move up and down repeatedly
remove or force from a position of dwelling previously occupied
to play music at loud volume
to enjoy some music greatly
dance erotically or dance with the pelvis thrust forward
come upon, as if by accident; meet with
assign to a lower position; reduce in rank