9-letter words containing o, b, t, r, u
- tenebrous — dark; gloomy; obscure.
- thon buri — a city in S Thailand, near Bangkok.
- thornbush — any of various shrubs or bushes having spines or thorns.
- troubling — to disturb the mental calm and contentment of; worry; distress; agitate.
- troublous — characterized by trouble; unsettled: troublous times.
- true-born — genuinely or authentically so because of birth: a trueborn son of Ireland; a trueborn Parisian.
- tube worm — any of various marine worms that produce and inhabit a tube, some being adapted to a hydrothermal vent environment.
- tubicolar — living in a self-constructed tube
- turboprop — turbo-propeller engine.
- turbopump — a turbine-driven pump, as one used to feed propellant to a rocket engine.
- turnabout — the act of turning in a different or opposite direction.
- umberto i — (Umberto I) 1844–1900, king of Italy 1878–1900.
- un-robust — strong and healthy; hardy; vigorous: a robust young man; a robust faith; a robust mind.
- unaborted — (esp of a baby or pregnancy) not aborted or ended
- ytterbous — of or containing ytterbium, esp. divalent ytterbium
- zorbonaut — a person who engages in the activity of zorbing