English Words: U

23,789 words · Page 131 of 476

underdevelopverb

To develop insufficiently.

underdevelopednessnoun

Synonym of underdevelopment (“state or condition of being underdeveloped”).

underdevelopmentnoun

The condition of being underdeveloped.

underdeviationnoun

A deviation from a target that results in less of something than was desired.

underdevilnoun

Synonym of subdevil.

underdiagnoseverb

To diagnose something less often than it actually occurs.

underdiagnosedadj

diagnosed less frequently than its occurrence.

underdiagnosisnoun

The failure to diagnose a condition in a significant proportion of patients.

underdialysisnoun

Insufficient dialysis.

underdifferentiateverb

To differentiate insufficiently.

underdifferentiationnoun

Insufficient differentiation.

underdigverb

To dig under or beneath (something); to undermine.

underdigestedadj

insufficiently digested

underdilationnoun

Less than normal dilation

underdiluteverb

To dilute insufficiently.

underdilutionnoun

Insufficient dilution.

underdimensionedadj

Having inadequate physical dimensions; too small.

underdirectverb

To exert too little artistic control when directing (a play or film).

underdisciplinedadj

disciplined too little

underdiscriminationnoun

Less than normal discrimination

underdiscussverb

To not discuss enough.

underdiscussedadj

That is not discussed enough.

underdispersedadj

Less than normally dispersed

underdispersionnoun

Insufficient dispersion

underdispersiveadj

Exhibiting or relating to underdispersion.

underdistributeverb

To distribute too little, or not widely enough.

underdistributionnoun

An inadequate distribution (especially of money).

underdiuresisnoun

Insufficient diuresis, typically causing inappropriate oliguria and thus potentially electrolyte imbalances or other sequelae.

underdivergencenoun

A lack of divergence.

underdiversificationnoun

Insufficient diversification.

underdiversifiedadj

Not sufficiently diversified.

underdiversifyverb

To fail to diversify sufficiently.

underdoverb

To do something insufficiently; especially, to undercook.

underdocumentedadj

Having inadequate documentation.

underdoernoun

One who underdoes something.

underdognoun

A competitor thought unlikely to win.

underdoggishadj

Characteristic of an underdog.

underdoggismnoun

Alternative form of underdogism.

underdoggyadj

Characteristic of an underdog.

underdogismnoun

Tenacious support for the underdog, or disadvantaged party

underdominancenoun

Less than normal dominance

underdominantadj

Relating to underdominance

underdoneadj

insufficiently cooked; undercooked

underdopeverb

To dope at less than the optimal level for superconductivity

underdosagenoun

An insufficient dosage

underdosenoun

An inadequate dose (of a medication).

underdotnoun

A dot placed below a letter, as a diacritical mark.

Underdownname

A surname.

underdraftnoun

Alternative form of underdraught.

underdragnoun

The tensile stress exerted by an overthrust rock mass upon overlying rocks which themselves are not under compressive thrusting stress and therefore tend to be stretched and broken by normal faulting.

Spelling & Dictionary Insight

The English alphabetical index for the letter U contains 23,789 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 476 pages, and you are currently viewing page 131. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "U" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.