Third-person singular simple present indicative form of oar.
Wiktionary
Oars Sentence Examples
On this boat there are places for 16 oars a side.
I saw Mr. Wilson and James row with oars.
Sails, paddles, oars and punting-poles are all in use.
The crew was supposed to consist of fifty, agreeing in number with the fifty oars of the "Argo," so called from its builder Argos, the son of Phrixus, or from apryos (swift).
A set of oars or a small auxiliary outboard are advisable.