salesmanship vs skill

salesmanship and skill both are nouns.

Word	Noun	Adjective	Verb	Adverb
salesmanship	Yes	No	No	No
skill	Yes	No	No	No

As nouns, skill is a hypernym of salesmanship; that is, skill is a word with a broader meaning than salesmanship:

Other hypernyms of salesmanship include accomplishment, acquirement, acquisition, attainment.

salesmanship (noun)	skill (noun)
skill in selling; skill in persuading people to buy	ability to produce solutions in some problem domain
	an ability that has been acquired by training