- Uncoiled Past Participle Verb
- Uncompact Adj Verb
- Uncompartmentalize Verb Past Participle Pres. Participle
- Uncomplicate Verb
- Uncompress Verb
- Unconceal Verb
- Unconcern Noun Verb
- Unconquer Verb
- Unconsider Verb Past Participle
- Unconventionalize Verb Past Participle Pres. Participle
- Uncork Verb Past Participle
- Uncount Verb Adj
- Uncouple Verb
- Uncoupled Adj Verb
- Uncover Verb
- Uncrackle Verb Noun
- Uncrate Verb
- Uncrater Verb
- Uncreate Verb
- Uncross Verb
- Uncrossed Adj Verb
- Uncrown Verb
- Uncumber Verb Past Participle
- Uncurb Verb Past Participle
- Uncurl Verb Past Participle Pres. Participle
- Uncurtain Verb Past Participle
- Undeal Verb
- Undeceive Verb
- Undelete Verb Noun
- Undeliver Verb
- Under-equip Verb Past Participle
- Under-tighten Verb
- Underachieve Verb
- Underact Verb
- Underbalance Noun Verb
- Underbid Noun Verb Past Participle
- Underburn Verb Noun
- Underbuy Verb Past Participle
- Undercapitalise Verb
- Undercapitalize Verb Past Participle
- Undercast Noun Verb
- Undercharge Noun Verb Past Participle
- Underclad Adj Verb
- Undercoat Noun Verb Adj
- Undercook Verb Noun
- Undercool Verb
- Undercount Noun Verb
- Undercut Noun Verb Past Participle
- Underdefine Verb
- Underdeliver Verb
- Underdevelop Verb
- Underdo Verb
- Underdose Noun Verb
- Underdrain Noun Verb Adj
- Underdress Noun Verb
- Underdrive Noun Verb Adj
- Underemphasise Verb
- Underemphasize Verb Past Participle
- Underemploy Verb
- Underestimate Verb Noun