15-letter words containing p, r, o, f, e, s
- self-proclaimed — to announce or declare in an official or formal manner: to proclaim war.
- self-production — produced by oneself or itself.
- self-propulsion — propulsion by a vehicle's own engine, motor, or the like.
- self-protection — protection of oneself or itself.
- self-supporting — the supporting or maintaining of oneself or itself without reliance on outside aid.
- simple fraction — a ratio of two integers.
- spanish trefoil — alfalfa.
- spare no effort — do all you can
- spelling reform — an attempt to change the spelling of English words to make it conform more closely to pronunciation.
- spirits of wine — alcohol (def 1).
- subprofessional — being below professional standards: subprofessional health care.
- sulfite process — a process for making wood pulp by digesting wood chips in an acid liquor consisting of sulfurous acid and a salt, usually calcium bisulfite.
- superconfidence — great or extreme confidence, overconfidence
- superfluousness — being more than is sufficient or required; excessive.
- theory of types — a theory advanced by Bertrand Russell to avoid the liar paradox, Russell's paradox, etc, in which a class of expressions or of the entities they represent can all enter into the same syntactic relations
- treaty of paris — a treaty of 1763 signed by Britain, France, and Spain that ended their involvement in the Seven Years' War
- work oneself up — become overwrought