ski jump vs ramp

ski jump and ramp both are nouns.

Word	Noun	Adjective	Verb	Adverb
ski jump	Yes	No	Yes	No
ramp	Yes	No	Yes	No

As nouns, ramp is a hypernym of ski jump; that is, ramp is a word with a broader meaning than ski jump:

Other hypernyms of ski jump include incline.

ski jump (noun)	ramp (noun)
a steep downward ramp from which skiers jump	an inclined surface connecting two levels
	a movable staircase that passengers use to board or leave an aircraft
	North American perennial having a slender bulb and whitish flowers

ski jump (verb)	ramp (verb)
jump on skis	stand with arms or forelegs raised, as if menacing
	creep up -- used especially of plants
	be rampant
	furnish with a ramp
	behave violently, as if in state of a great anger