13-letter words containing b, u, r, o, s
- unobtrusively — not obtrusive; inconspicuous, unassertive, or reticent.
- unresponsible — answerable or accountable, as for something within one's power, control, or management (often followed by to or for): He is responsible to the president for his decisions.
- unsmotherable — unquenchable
- unsupportable — capable of being supported; endurable; maintainable.
- vitreous body — a transparent gelatinous substance, permeated by fine fibrils, that fills the interior of the eyeball between the lens and the retina
- water-soluble — capable of dissolving in water.
- whole numbers — Also called counting number. one of the positive integers or zero; any of the numbers (0, 1, 2, 3, …).