- Undefinable Adj.
- Undefined Adj.
- Undeflected Adj. Part. Perf.
- Undeformed Adj. Part. Perf.
- Undelayable Adj.
- Undelayed Adj. Part. Perf.
- Undeliverable Adj. Subst.
- Undelivered Adj. Part. Perf.
- Undemanding Adj.
- Undemocratic Adj.
- Undemocratical Adj.
- Undemonstrable Adj.
- Undemonstrative Adj.
- Undeniable Adj.
- Undenominational Adj.
- Undented Adj.
- Undependable Adj.
- Undepreciated Adj. Part. Perf.
- Undepressed Adj. Part. Perf.
- Under-resourced Adj.
- Under-the-table Adj. Adv.
- Underachievement Subst. Adj.
- Underachiever Subst. Adj.
- Underachieving Adj. Subst.
- Underactive Adj.
- Underage Adj. Subst.
- Underaging Subst. Adj.
- Underappreciated Adj.
- Underarm Adj. Subst. Adv.
- Underarmed Adj.
- Underassessed Adj.
- Underbaked Adj.
- Underbelly Subst. Adj.
- Underbidder Subst. Adj.
- Underblanket Subst. Adj.
- Underboarding Subst. Adj.
- Underbody Subst. Adj.
- Underbooked Adj.
- Underbred Adj. Part. Perf.
- Underbridge Subst. Adj.
- Underbrush Subst. Adj.
- Underbudgeted Adj. Part. Perf.
- Underbunching Subst. Adj.
- Underbust Subst. Adj.
- Undercapacity Subst. Adj.
- Undercapitalised Adj.
- Undercapitalization Subst. Adj.
- Undercapitalized Adj.
- Undercarriage Subst. Adj.
- Undercharged Adj.
- Underclad Adj. Verb
- Underclass Subst. Adj.
- Underclassman Subst. Adj.
- Underclay Subst. Adj.
- Underclerk Subst. Adj.
- Undercliff Subst. Adj. Eigenn.
- Underclothed Adj.
- Underclothes Subst. Adj.
- Underclothing Subst. Adj.
- Undercoat Subst. Verb Adj.