13-letter words containing u, n, g, r, a, c
- ungrammatical — grammatically incorrect or awkward; not conforming to the rules or principles of grammar or accepted usage: an ungrammatical sentence.
- unreproaching — not reproaching or blaming
- unscavengered — lacking the qualities of having been scavenged
- vacuum drying — the removal of liquid from a solution or mixture at reduced air pressure so that it dries at a lower temperature than would be required at full pressure.