- Underetch Verb Noun Adj
- Underexpand Verb
- Underexplored Past Participle Verb
- Underexpose Verb
- Underfeed Verb Adj
- Underfill Noun Verb Adj
- Underfit Verb Adj
- Underflow Noun Verb Adj
- Underfund Verb
- Undergird Verb
- Underglaze Noun Verb Adj
- Undergo Verb
- Underkeep Verb
- Underlap Noun Verb Adj
- Underlay Noun Verb Adj
- Underlease Noun Verb Adj
- Underlet Verb Noun Past Participle
- Underlie Verb
- Underline Noun Verb Adj
- Underload Noun Verb Adj
- Undermine Verb
- Undernourish Verb Past Participle Pres. Participle
- Underpaid Adj Verb
- Underpass Noun Verb Adj
- Underpay Verb
- Underperform Verb
- Underpin Verb
- Underplay Verb Noun
- Underplayed Adj Verb
- Underplot Noun Verb
- Underpower Verb Past Participle
- Underprice Verb Noun
- Underproduce Verb Past Participle Pres. Participle
- Underprop Verb Noun
- Underprovide Verb Past Participle Pres. Participle
- Underprovision Noun Verb Past Participle
- Underrate Verb
- Underreach Noun Verb
- Underream Verb Noun
- Underreport Verb
- Underrun Noun Verb
- Underscan Noun Verb
- Underscore Noun Verb Adj
- Underseal Noun Verb Adj
- Undersell Verb
- Undershoot Verb Noun Adj
- Undersign Verb Noun Past Participle
- Undersize Adj Verb Noun
- Underslip Noun Verb Adj
- Undersow Verb
- Underspecify Verb
- Underspend Verb Noun Past Participle Pres. Participle
- Understaff Verb
- Understand Verb
- Understand in Verb
- Understate Verb
- Understeer Noun Verb Adj
- Understock Noun Verb
- Understudy Noun Verb Adj
- Undersupply Noun Verb Adj