seamanship vs skill

seamanship and skill both are nouns.

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

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

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

seamanship (noun)	skill (noun)
skill in sailing	ability to produce solutions in some problem domain
	an ability that has been acquired by training