18-letter words containing b, o, t, h, r, i
- octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
- optical brightener — an additive that dyes and brightens fabric or paper
- probability theory — the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Compare probability (def 4).
- protease inhibitor — a drug that inhibits the action of protease, especially any of a class of antiviral drugs that prevent the cleavage and replication of HIV proteins.
- rub shoulders with — to mix with socially or associate with
- rubbish collection — the collection of domestic refuse for disposal
- saint john's bread — carob (def 2).
- september holidays — a period of time in September when people do not have to go to school, college or work
- sindbad the sailor — (in The Arabian Nights' Entertainments), a wealthy citizen of Baghdad who relates the adventures of his seven wonderful voyages.
- the bird has flown — the person in question has fled or escaped
- tip of the iceberg — a large floating mass of ice, detached from a glacier and carried out to sea.
- to be said for sth — If you say there is a lot to be said for something, you mean you think it has a lot of good qualities or aspects.
- urban homesteading — homesteading (def 2).
- water on the brain — hydrocephalus.
- westinghouse brake — a railroad air brake operated by compressed air.