13-letter words containing f, e, n, l, u, r
- unreproachful — not deserving reproach or blame
- unrestfulness — the state of being restless
- unsuperficial — external or outward: a superficial resemblance.
- unsuperfluous — not superfluous or excessive; moderate
- unvitrifiable — not able to be vitrified
- user-friendly — easy to use, operate, understand, etc.: the most user-friendly personal computer now on the market.
- venus flytrap — firewall machine
- wasterfulness — the state of being wasteful
- wonderfulness — excellent; great; marvelous: We all had a wonderful weekend.