12-letter words containing o, s, i
- bible school — a school or study program devoted to Bible study, esp at a church
- bibliologist — a student of bibliology
- bibliopegist — a bookbinder
- bichon frise — a small white poodle-like dog of European origin, with a silky, loosely curling coat
- bicycle shop — a shop that sells and usually repairs bicycles and bicycle parts
- big-sounding — meant to be impressive in scale
- bill of sale — a deed transferring personal property, either outright or as security for a loan or debt
- binding post — one of several metal pegs or rods, fitted into a loose-leaf binder, for holding sheets with prepunched holes.
- bio-organism — a dangerous fast-proliferating organism that could be used as the basis of a biological weapon
- bio-security — the precautions taken to protect against the spread of lethal or harmful organisms and diseases
- bioacoustics — the study of animals' use of sound
- bioastronomy — the branch of biology which deals with the study or the discovery of life forms on other planets or in space
- biochemistry — Biochemistry is the study of the chemical processes that happen in living things.
- biocorrosion — corrosion caused by or enhanced by bacteria or other microorganisms; biologically induced corrosion.
- biodiversity — Biodiversity is the existence of a wide variety of plant and animal species living in their natural environment.
- biohazardous — a pathogen, especially one used in or produced by biological research.
- biomagnetics — the study of magnetic fields as a form of therapy
- biomagnetism — animal magnetism.
- biomechanics — the study of the mechanics of the movement of living organisms
- biopesticide — a naturally occurring or derived substance or an organism that controls pests by nontoxic means
- biorhythmics — the study of biorhythms
- biosatellite — an artificial satellite for carrying living organisms
- bioscientist — any science that deals with the biological aspects of living organisms.
- biosociology — the study of the evolution of social forms and the development of social behavior in terms analogous to or correlated with biological studies.
- biosynthesis — the formation of complex compounds from simple substances by living organisms
- biosynthetic — of, relating to, or characterized by biosynthesis, the formation of chemical compounds by a living organism, or a laboratory process modeled after these reactions in living organisms.
- bioterrorism — Bioterrorism is terrorism that involves the use of biological weapons.
- bird's mouth — a right-angled notch cut in the underside of a rafter for fitting over a longitudinal member, as a wall plate.
- bird-spotter — a bird-watcher
- bishop's-cap — any of a genus (Mitella) of small woodland plants of the saxifrage family, with two-lobed seedcases shaped like a bishop's hat
- bit of skirt — a girl or woman
- biting louse — any wingless insect of the order Mallophaga, such as the chicken louse: external parasites of birds and mammals with biting mouthparts
- bitter aloes — a bitter purgative drug made from the leaves of several species of aloe
- blastocoelic — of or relating to the blastocoel
- blastulation — the process of blastula formation
- blind-emboss — blind-stamp.
- block island — an island off the coast of and a part of Rhode Island, at the E entrance to Long Island Sound.
- block signal — a fixed railroad signal governing the movements of trains entering and using a given section of track.
- blockbusting — A blockbusting film or book is one that is very successful, usually because it is very exciting.
- blood sister — a sister by birth
- blood spavin — a disease of the hock joint of horses in which enlargement occurs because of collected fluids (bog spavin) bony growth (bone spavin) or distention of the veins (blood spavin)
- bloodstained — Someone or something that is bloodstained is covered with blood.
- bloodsucking — any animal that sucks blood, especially a leech.
- bloodthirsty — Bloodthirsty people are eager to use violence or display a strong interest in violent things. You can also use bloodthirsty to refer to very violent situations.
- bloody shirt — something, as a political issue or historical event, that can be used to stir up outrage, partisan support, etc.
- blossom into — the flower of a plant, especially of one producing an edible fruit.
- blue stilton — a rich cheese made from whole milk, blue-veined and very strong in flavour
- bluestocking — A bluestocking is an intellectual woman.
- boardsailing — windsurfing
- boatsmanship — seamanship as applied to boats, especially rowboats and motorboats.