What's the noun for oar? Here's the word you're looking for.
oar
An implement used to propel a boat or a ship in the water, having a flat blade at one end, being rowed from the other end and being normally fastened to the vessel.
“But, as luck would have it, scarcely had he started to row his boat again when an oarlock broke, and so it took him the best part of an hour to make the trip.”
“But just as the women were about to make a move to pull even, one of the oars popped out of its oarlock.”
“This innovative oarlock system design incorporates a new 'tension arm' mechanism within the gate that holds your oar tight against the pin.”