ski vs slalom

ski and slalom both are nouns.

Word	Noun	Adjective	Verb	Adverb
ski	Yes	No	Yes	No
slalom	Yes	No	Yes	No

As verbs, slalom is a hyponym of ski; that is, slalom is a word with a more specific, narrower meaning than ski:

Other hyponyms of ski include wedel, hot-dog, schuss, water ski.

ski (noun)	slalom (noun)
narrow wood or metal or plastic runners used in pairs for gliding over snow	a downhill race over a winding course defined by upright poles

ski (verb)	slalom (verb)
move along on skis	race on skis around obstacles