13-letter words containing b, y, r, u, s
- unforeseeably — to have prescience of; to know in advance; foreknow.
- unobtrusively — not obtrusive; inconspicuous, unassertive, or reticent.
- unpleasurably — without pleasure, in an unpleasurable manner
- unsurpassably — in an unsurpassable manner; in a way that cannot be surpassed
- visual binary — a binary star having components that are sufficiently separated to be resolved by a telescope.
- vitreous body — a transparent gelatinous substance, permeated by fine fibrils, that fills the interior of the eyeball between the lens and the retina
- x-ray burster — a celestial source from which bursts of x-rays are received.