13-letter words containing b, o, r, s, t, a
- treasury bond — any of various interest-bearing bonds issued by the U.S. Treasury Department, usually maturing over a long period of time.
- triploblastic — having three primary germ layers, as the embryos of vertebrates.
- unsmotherable — unquenchable
- unsupportable — capable of being supported; endurable; maintainable.
- variable cost — a cost that varies with a change in the volume of output while remaining uniform on a per-unit basis, as cost of labor (distinguished from fixed cost).
- vasoinhibitor — an agent, as a drug, that inhibits the action of the vasomotor nerves.
- water-soluble — capable of dissolving in water.
- weatherboards — Plural form of weatherboard.