13-letter words containing n, o, l, f
- unfortunately — suffering from bad luck: an unfortunate person.
- unofficiously — objectionably aggressive in offering one's unrequested and unwanted services, help, or advice; meddlesome: an officious person.
- unperformable — to carry out; execute; do: to perform miracles.
- unrefined oil — oil that hasn't been refined or processed
- unreproachful — not deserving reproach or blame
- unsuperfluous — not superfluous or excessive; moderate
- volcanic tuff — tuff2 .
- watch oneself — to be careful, cautious, or discreet
- waterflooding — (in oil, gas, or petroleum production) the practice of injecting water to maintain pressure in a reservoir and to drive the oil, etc towards the production wells
- well-informed — having extensive knowledge, as in one particular subject or in a variety of subjects.
- wolffian body — the mesonephros.
- wolffian duct — a duct, draining the mesonephros of the embryo, that becomes the vas deferens in males and vestigial in females.
- wonderfulness — excellent; great; marvelous: We all had a wonderful weekend.
- working fluid — a liquid or gaseous working substance.