oarsmanship vs skill

oarsmanship and skill both are nouns.

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

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

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

oarsmanship (noun)	skill (noun)
skill as an oarsman	ability to produce solutions in some problem domain
	an ability that has been acquired by training