13-letter words containing a, l, y, s, u
- unspiritually — in an unspiritual manner
- unsteadfastly — in an unsteadfast manner
- unsuitability — the quality of being inappropriate, unsuitable, or unfit
- unsurpassably — in an unsurpassable manner; in a way that cannot be surpassed
- unsustainably — not sustainable; not to be supported, maintained, upheld, or corroborated.
- unsymmetrical — characterized by or exhibiting symmetry; well-proportioned, as a body or whole; regular in form or arrangement of corresponding parts.
- venus flytrap — firewall machine
- visual acuity — acuteness of the vision as determined by a comparison with the normal ability to define certain letters at a given distance, usually 20 feet (6 meters). Abbreviation: V.
- visual binary — a binary star having components that are sufficiently separated to be resolved by a telescope.
- zygodactylous — Also, zygodactylous. (of a bird) having the toes of each foot arranged in pairs, with two toes in front and two behind.