13-letter words containing p, r, e, v, u
- unperceivably — imperceptibly
- unperceivedly — without being perceived; so as not to be perceived
- unpreventable — not able to be prevented
- unprogressive — favoring or advocating progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters: a progressive mayor.
- unprovisioned — a clause in a legal instrument, a law, etc., providing for a particular matter; stipulation; proviso.
- unprovocative — tending or serving to provoke; inciting, stimulating, irritating, or vexing.
- unreprievable — not able to be reprieved, eased, or postponed
- upland plover — a large, field-inhabiting sandpiper, Bartramia longicauda, of eastern North America, resembling a plover: now protected and increasing in numbers.
- vapourer moth — a tussock moth, Orgyia antiqua, of hedgerows and trees, the female of which is wingless and lays her eggs on her former cocoon
- vapourishness — the quality or state of being vapourish
- venus flytrap — firewall machine
- vide ut supra — (used to direct a reader to a specified place in a text) see as above
- visual purple — rhodopsin.
- vivisepulture — the burying of something while still alive
- volute spring — a coil spring, conical in shape, extending in the direction of the axis of the coil.