English Words Starting With B

• buttonmold

  nounExtremely Rare / Archaic
  /ˈbʌt(ə)nˌməʊld/A flattened disc of metal, bone, or other material, from which a button is made.
• buttonmould

  nounVery Rare
  /ˈbʌt(ə)nməʊld/A mould or die used in the manufacturing process for casting or forming buttons.
• buttons

  nounA2 (High)
  /ˈbʌt.ənz/A small disk or knob sewn to a garment, used to fasten it by being passed through a hole; a small round object pressed to activate a mechanism.
• buttonwood

  nounC2
  /ˈbʌt(ə)nwʊd/A type of tree, specifically the American sycamore or plane tree (Platanus occidentalis).
• buttress

  nounverbverb-transitiveC1
  /ˈbʌt.rəs/A projecting support built against a wall to strengthen or reinforce it.
• buttress root

  nounC1/C2
  /ˈbʌtrɪs ruːt/A large, thickened, above-ground root structure of certain trees, growing from the trunk base and spreading outwards, which provides physical support.
• buttress thread

  nounVery Low
  /ˈbʌtrɪs θrɛd/A type of screw thread with one load-bearing flank that is perpendicular to the screw axis and one non-load-bearing flank that is sloped, designed to handle high axial loads in one direction.
• butts and bounds

  plural-nounRare/Specialist
  /ˌbʌts ən(d) ˈbaʊndz/The precise outer limits and boundaries of a property, especially agricultural land.
• buttstock

  nounC1/C2
  /ˈbʌtstɒk/The fixed, rearward part of a firearm (such as a rifle or shotgun) which is placed against the shooter's shoulder when aiming and firing.
• buttstrap

  nounverb-transitiveTechnical/Rare
  /ˈbʌtstrap/A reinforcing strap or support placed at the end of a component where it connects or receives stress.
• butty

  nounC1 (Low frequency, highly regional/context-specific)
  /ˈbʌti/A sandwich, typically made with two slices of buttered bread.
• butuan

  nounVery Low
  /buːˈtuːən/A city in the Philippines, capital of the Agusan del Norte province, located in the Caraga region of Mindanao.
• butung

  nounExtremely low (virtually zero in general English)
  /ˈbuːtʊŋ/ (approximation based on common Anglicisation)Not a standard English word. This appears to be a potential English loanword or proper noun from regional languages (e.g., Tagalog, Cebuano, Malay/Indonesian). In those languages, it can refer to a type of tropical jackfruit or breadfruit tree or its fruit.
• butut

  nounVery Rare
  /buːˈtuːt/A former subunit of currency in the Gambia, representing a fraction of a dalasi.
• butyl

  adjectivenounC1
  /ˈbjuːtɪl/A chemical group derived from butane, consisting of four carbon and nine hydrogen atoms (C₄H₉).
• butyl acetate

  nounC2
  /ˈbjuːtɪl ˈæsɪteɪt/A colourless ester used primarily as a solvent in paints, coatings, and nail polish removers.
• butyl alcohol

  nounVery Low
  /ˈbjuːtɪl ˈælkəhɒl/A colorless, flammable liquid alcohol derived from butane, used primarily as an industrial solvent and in chemical synthesis.
• butyl aldehyde

  nounVery Low
  /ˌbjuːtɪl ˈældɪhaɪd/A colourless, flammable liquid aldehyde (C5H10O), also known as valeraldehyde, with a pungent, fruity odour.
• butyl group

  nounLow
  /ˈbjuːtʌɪl ɡruːp/A univalent alkyl radical or substituent derived from butane, having the formula -C₄H₉. It is one of four isomeric forms of a four-carbon alkyl chain attached to another molecule.
• butyl nitrite

  nounVery Low
  /ˈbjuːtɪl ˈnaɪtraɪt/A chemical compound, specifically an alkyl nitrite with the formula C₄H₉NO₂, used medically as a vasodilator and recreationally as a psychoactive substance.

Showing 9881–9900 of 10030 words.