4-letter words containing b, u
- glub — The sound of underwater bubbles, or of water bubbling (often used repetitively).
- grub — the thick-bodied, sluggish larva of several insects, as of a scarab beetle.
- guib — bushbuck.
- habu — a large venomous snake, Trimeresurus flavoviridis, of Okinawa and other Ryukyu Islands: family Crotalidae (pit vipers)
- hubs — hub
- ibeu — Independent Bakery Employees Union
- juba — (formerly, especially in creole-speaking cultures) a name given at birth to a black child, in accordance with African customs, indicating the child's sex and the day of the week on which he or she was born, as the male and female names for Sunday (Quashee and Quasheba) Monday (Cudjo or Cudjoe and Juba) Tuesday (Cubbena and Beneba) Wednesday (Quaco and Cuba or Cubba) Thursday (Quao and Abba) Friday (Cuffee or Cuffy and Pheba or Phibbi) and Saturday (Quamin or Quame and Mimba)
- jube — a screen with an upper platform, separating the choir of a church from the nave and often supporting a rood.
- knub — the point, gist, or heart of something.
- luba — a member of any of various groups of agricultural and hunting people inhabiting the SE Democratic Republic of the Congo, some of whom are famous for their wood carvings.
- lube — lubricant.
- musb — Bachelor of Music
- ntub — National Trade Union Bodies
- nuba — a member of a formerly warlike Nilotic people living chiefly in the hills of S central Sudan
- nubs — Plural form of nub.
- nuby — An article of clothing similar to a scarf or a shawl.
- numb — deprived of physical sensation or the ability to move: fingers numb with cold.
- ombu — a South American tree, Phytolacca dioica, having a thick trunk and large, evergreen leaves.
- phub — to ignore (a person or one's surroundings) when in a social situation by busying oneself with a phone or other mobile device: Hey, are you phubbing me? I hate to see a mother wheeling a stroller while phubbing her baby.
- pube — a pubic hair
- publ — published
- quab — An unfledged bird.
- quib — (archaic) A quip or gibe.
- quob — (intransitive, obsolete, rare) To throb; to quiver.
- qutb — (in Sufism) the highest-ranking saint, the focal point of all spiritual energy.
- rube — Arthur Joseph, 1908–90, U.S. jurist, statesman, and diplomat: associate justice of the U.S. Supreme Court 1962–65; ambassador to the U.N. 1965–68.
- rubi — furigana
- ruby — a red variety of corundum, used as a gem.
- sbus — (hardware) The hardware interface for add-in boards in later Sun-3 (and Sun-4?) workstations.
- slub — to extend (slivers of fiber) and twist slightly in carding.
- snub — to treat with disdain or contempt, especially by ignoring.
- stub — a short projecting part.
- sub- — Sub- is used at the beginning of words that have 'under' as part of their meaning.
- suba — a shepherd's cloak or sheepskin coat
- subs — a submarine.
- tabu — to put under a taboo; prohibit or forbid. Synonyms: prohibit, ban, forbid, proscribe. Antonyms: allow, permit, sanction.
- tuba — Music. a valved, brass wind instrument having a low range. an organ reed stop of large scale with tones of exceptional power. an ancient Roman trumpet.
- tube — a hollow, usually cylindrical body of metal, glass, rubber, or other material, used especially for conveying or containing liquids or gases.
- ub40 — a registration card issued by the Department of Employment to a person registering as unemployed
- uber — having the specified property to an extreme or excessive degree; very: an uber fancy restaurant.
- ubpa — Unfair Business Practices Act
- ukba — UK Border Agency
- umbo — a boss on a shield, as one at the center of a circular shield.
- unbe — to (cause to) lack existence
- uv-b — ultraviolet light with a relatively short wavelength.
- wbua — Womens Baseball Umpire Association
- wpbu — World Professional Boxing Union
- yuba — Dried tofu skin; the film that forms on top of a vat of boiling soy milk.
- zebu — one of a domesticated form of cattle, Bos taurus indicus, of India, having a large hump over the shoulders and a large dewlap.