oarlock vs rowlock

oarlock and rowlock both are nouns.

Word	Noun	Adjective	Verb	Adverb
oarlock	Yes	No	No	No
rowlock	Yes	No	No	No

As nouns, oarlock and rowlock are synonyms defined as:

oarlock and rowlock: 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 oarlock include peg, pin, thole, tholepin.

oarlock (noun)	rowlock (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