13-letter words containing b, u, s, i, n
- unstabilizing — to make or hold stable, firm, or steadfast.
- unsubstantial — not substantial; having no foundation in fact; fanciful; insubstantial: an unsubstantial argument; unsubstantial hopes.
- unsubstantive — a noun.
- unsuitability — the quality of being inappropriate, unsuitable, or unfit
- unsusceptible — not susceptible or impressionable; not possible or easy to influence; not vulnerable (to harm)
- unsustainable — not sustainable; not to be supported, maintained, upheld, or corroborated.
- unsustainably — not sustainable; not to be supported, maintained, upheld, or corroborated.
- untarnishable — to dull the luster of (a metallic surface), especially by oxidation; discolor.
- unwhistleable — incapable of being whistled
- urban studies — the various disciplines associated with the study of urban areas, including urban planning, urban economics and urban architecture
- visual binary — a binary star having components that are sufficiently separated to be resolved by a telescope.
- within bounds — not beyond limits