- Undercoated Adj
- Undercompensated Adj
- Undercooked Adj
- Undercooled Adj
- Undercoupled Adj
- Undercover Adj Adv
- Undercritical Adj
- Underdamped Adj
- Underdense Adj
- Underdesigned Adj
- Underdetermined Adj
- Underdeveloped Adj
- Underdog Noun Adj
- Underdone Adj
- Underdressed Adj
- Underdriven Adj
- Underdumped Adj
- Undereducated Adj
- Underemphasised Adj
- Underemphasized Adj
- Underemployed Adj
- Underestimated Adj
- Underexcited Adj
- Underexpanded Adj
- Underexploited Adj
- Underexposed Adj
- Underfed Adj
- Underfifiring Adj
- Underfilled Adj
- Underfinanced Adj
- Underfired Adj
- Underfit Verb Adj
- Underfloor Noun Adj
- Underflow Noun Verb Adj
- Underflowing Adj
- Underflying Adj
- Underfoot Adv Adj
- Underframe Noun Adj
- Underfunded Adj
- Undergraduate Adj Noun
- Underground Adj Adv Noun
- Undergrounded Adj
- Undergrowth Noun Adj
- Underhand Adj Adv
- Underhanded Adj
- Underheated Adj
- Underhoused Adj
- Underhung Adj
- Underinsured Adj
- Underivable Adj
- Underived Adj
- Underlay Noun Verb Adj
- Underlaying Adj
- Underleased Adj
- Underline Noun Verb Adj
- Underlined Adj
- Underloaded Adj
- Underlying Adj Pres. Participle Noun
- Undermanaged Adj
- Undermanned Adj