- Uglify Verb
- Ulcerate Verb
- Ultracentrifuge Noun Verb
- Ultrafilter Noun Verb
- Ululate Verb
- Umlaut Noun Verb
- Ump Noun Verb
- Umpire Noun Verb
- Unaccent Verb Noun
- Unaccomplish Verb
- Unadminister Verb
- Unalter Verb
- Unanchor Verb
- Unanswer Verb
- Unarchive Verb
- Unarm Verb
- Unassign Verb
- Unattach Verb
- Unbalance Noun Verb
- Unban Verb
- Unbar Verb
- Unbark Verb
- Unbelt Verb
- Unbend Verb
- Unbethink Verb
- Unbias Verb
- Unbind Verb
- Unblemish Verb
- Unblock Verb
- Unbolt Verb
- Unbone Verb
- Unbosom Verb
- Unbound Adj Verb
- Unbox Verb
- Unbrace Verb
- Unbracket Verb
- Unbraid Verb
- Unbridle Verb
- Unbrother Verb
- Unbuckle Verb
- Unbuffer Verb
- Unbuild Verb
- Unbundle Verb
- Unburden Verb
- Unbutton Verb
- Uncage Verb
- Uncap Verb
- Uncapitalize Verb
- Uncase Verb
- Uncash Verb
- Uncatch Verb
- Uncensor Verb
- Uncenter Verb
- Unchain Verb
- Uncheck Verb
- Uncherish Verb
- Unchoose Verb
- Unchurch Verb
- Uncircumcise Verb
- Uncivilise Verb