18-letter words containing o, f, t, p, i
- to play favourites — to display favouritism
- torsion-free group — a group in which every element other than the identity has infinite order.
- unfair competition — acts done by a seller to confuse or deceive the public with intent to acquire a larger portion of the market, as by cutting prices below cost, misleading advertising, selling a spurious product under a false identity, etc.
- visiting professor — a professor from another institution invited to teach at a university or college for a limited period, usually for a semester or one academic year.