oarsmanship

Skill as an oarsman.

octothorp

noun

The hash or square symbol (#), used mainly in telephony and computing.

offramp

noun

a sloping one-way road leading off a main highway.

olp

oneupmanship

noun
  1. The art or practice of successively outdoing a competitor.
    They are bent on one-upmanship. I think
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oop

Op

noun
  1. An operation.
    My mother's going in for her knee op today.
  2. An amateur radio operator.
  3. An operator on
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Opp

abbreviation, symbol

opposite.