13-letter words containing b, o, y, t, r, a
- transboundary — something that indicates bounds or limits; a limiting or bounding line.
- treasury bond — any of various interest-bearing bonds issued by the U.S. Treasury Department, usually maturing over a long period of time.
- tricarboxylic — pertaining to a molecule that contains three carboxyl groups.
- uncomfortably — causing discomfort or distress; painful; irritating.
- unforgettably — impossible to forget; indelibly impressed on the memory: scenes of unforgettable beauty.
- unworkability — the quality or state of being unworkable