thole vs tholepin

thole and tholepin both are nouns.

Word	Noun	Adjective	Verb	Adverb
thole	Yes	No	No	No
tholepin	Yes	No	No	No

As nouns, thole and tholepin are synonyms defined as:

thole and tholepin: a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing

Other synonyms of thole include oarlock, peg, pin, rowlock.

thole (noun)	tholepin (noun)
a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing	a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing