- Undebatable Adj.
- Undebated Adj. Part. Perf.
- Undecadiene Subst. Adj.
- Undecagon Subst. Adj.
- Undecalactone Subst. Adj.
- Undecanal Subst. Adj.
- Undecanaphthenic Adj.
- Undecane Subst. Adj.
- Undecanol Subst. Adj.
- Undecanoyl Subst. Adj.
- Undecayed Adj. Part. Perf.
- Undeceived Adj.
- Undeceiving Adj.
- Undecenal Subst. Adj.
- Undecene Subst. Adj.
- Undecenol Subst. Adj.
- Undecidable Adj. Subst.
- Undecided Adj. Part. Perf.
- Undecipherable Adj.
- Undeciphered Adj. Part. Perf.
- Undecisive Adj.
- Undecked Adj.
- Undeclared Adj. Part. Perf.
- Undeclinable Adj.
- Undeclined Adj. Part. Perf.
- Undecomposable Adj.
- Undecomposed Adj. Part. Perf.
- Undecorated Adj. Part. Perf.
- Undecylenic Adj.
- Undecylic Adj. Subst.
- Undefeated Adj. Subst.
- Undefendable Adj.
- Undefended Adj.
- Undefiled Adj.
- Undefinability Subst. Adj.
- 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.