15-letter words containing o, m, i, t, s
- be of two minds — to be undecided or irresolute
- bide one's time — to wait patiently for an opportunity
- billings method — a natural method of birth control that involves examining the colour and viscosity of the cervical mucus to discover when ovulation is occurring
- biogeochemistry — the science of biological, chemical, and geological aspects of the environment
- bituminous coal — a soft black coal, rich in volatile hydrocarbons, that burns with a smoky yellow flame. Fixed carbon content: 46–86 per cent; calorific value: 1.93 × 107 – 3.63 × 107 J/kg
- black mountains — a mountain range running from N Monmouthshire and SE Powys (Wales) to SW Herefordshire (England). Highest peak: Waun Fach, 811 m (2660 ft)
- bohemian forest — a mountain range between the SW Czech Republic and SE Germany. Highest peak: Arber, 1457 m (4780 ft)
- boston marriage — (especially in 19th-century New England) an intimate friendship between two women often maintaining a household together.
- british telecom — the popular name for British Telecommunications Group plc, the dominant fixed line telecommunications and broadband internet provider in the United Kingdom
- brother-in-arms — a fellow soldier or comrade in a shared struggle
- cairngorm-stone — smoky quartz.
- capitulationism — advocacy or approval of capitulation.
- casement-window — a window sash opening on hinges that are generally attached to the upright side of its frame.
- castanospermine — a substance obtained from the Australian chestnut or black bean tree
- castrametations — Plural form of castrametation.
- centrosymmetric — having symmetry with a central point
- chamois leather — soft cleaning cloth
- chemopsychiatry — the study and application of chemical substances in psychiatry
- chemosterilants — Plural form of chemosterilant.
- chemotaxonomist — a specialist in the field of chemotaxonomy
- cholesterolemia — the presence of an abnormal amount of cholesterol in the blood.
- christmas carol — a joyful hymn or religious song, celebrating the birth of Christ
- chromatic scale — a twelve-note scale including all the semitones of the octave
- cigarette smoke — the acrid smoke produced by cigarettes being smoked
- circumlocutions — Plural form of circumlocution.
- circumlocutious — Circumlocutional.
- circumscription — the act of circumscribing or the state of being circumscribed
- circumvolutions — Plural form of circumvolution.
- cleistogamously — in a cleistogamous manner
- coast mountains — a mountain range in Canada, on the Pacific coast of British Columbia. Highest peak: Mount Waddington, 4043 m (13 266 ft)
- combat fatigues — the uniform worn by soldiers when fighting
- combat neurosis — battle fatigue.
- combustibleness — The state or quality of being combustible.
- combustion tube — a tube of heat-resistant glass, silica, or ceramic, in which a substance can be reduced, as in a combustion furnace
- come up against — If you come up against a problem or difficulty, you are faced with it and have to deal with it.
- comfort station — a public lavatory and rest room
- commiseratingly — in a manner expressing commiseration
- committee stage — (in British parliamentary procedure) the detailed examination by MPs of proposed legislation
- committeeperson — a member of a committee.
- common disaster — the death of an insured party and a beneficiary occurring at the same time in the same accident.
- communist china — China, People's Republic of.
- communist party — (in non-Communist countries) a political party advocating Communism
- communistically — In a communistic manner.
- community chest — a fund raised by voluntary contribution for local welfare activities
- comparativeness — of or relating to comparison.
- comparison test — a comparison of particular qualities or traits in two or more things in order to get a measurable assessment
- compassionately — having or showing compassion: a compassionate person; a compassionate letter.
- compassionating — Present participle of compassionate.
- compatibilities — capable of existing or living together in harmony: the most compatible married couple I know.
- competitiveness — of, pertaining to, involving, or decided by competition: competitive sports; a competitive examination.