ski pants vs salopettes

ski pants and salopettes both are nouns.

Word	Noun	Adjective	Verb	Adverb
ski pants	Yes	No	No	No
salopettes	Yes	No	No	No

As nouns, ski pants and salopettes are synonyms defined as:

ski pants and salopettes: trousers usually of stretch material and kept taut by a strap under the foot, worn for skiing or as a fashion garment.

ski pants (noun)	salopettes (noun)
trousers usually of stretch material and kept taut by a strap under the foot, worn for skiing or as a fashion garment.	trousers usually of stretch material and kept taut by a strap under the foot, worn for skiing or as a fashion garment.