English Words: U

23,789 words · Page 114 of 476

Not debauched.

undebilitatedadj

Not debilitated

undebilitatingadj

Not debilitating.

Not debrided.

Not debriefed.

undebuggabilitynoun

The quality of being undebuggable.

undebuggableadj

That cannot be debugged.

That has not been debugged.

Not debunked.

Not debuted; not formally introduced or released.

eleven

undecaacetatenoun

Any compound that has eleven acetate groups (typically of a disaccharide)

undecaboratenoun

Eleven borate anions in a compound

Not decadent.

undecaffeinatedadj

Not decaffeinated.

A polygon with eleven sides and eleven angles.

Having eleven sides and angles.

undecahedronnoun

A polyhedron with eleven faces.

Eleven heme groups in a molecule

undecahydratenoun

A hydrate whose solid contains eleven molecules of water of crystallization per molecule, or per unit cell

undecahydroxynoun

Chemical containing eleven hydroxy groups, (OH)₁₁

undecalcifiedadj

From which calcareous matter has not been removed.

Of or pertaining to an undecamer.

The saturated aliphatic aldehyde having eleven carbon atoms

Any of many isomers of the aliphatic hydrocarbon having 11 carbon atoms, but especially n-undecane CH₃(CH₂)₉CH₃

undecanoatenoun

Any salt or ester of undecanoic acid.

Of or pertaining to undecanoic acid or its derivatives

A fatty alcohol with a citrus odour, sometimes used as flavouring.

undecanucleotidenoun

An oligonucleotide that has eleven base pairs

undecaoxidenoun

Any oxide having eleven oxygen atoms

undecapeptidenoun

Any oligopeptide that has eleven amino acid units

undecapitatedadj

Not decapitated

undecapotassiumnoun

Eleven potassium atoms or ions in a compound (K₁₁).

undecaprenylnoun

The univalent radical derived from undecaprenol

undecasulfidenoun

A sulfide containing eleven sulfur functional groups or ions.

undecasyllabicadj

Having eleven syllables.

Not decayable

Not having decayed.

That does not decay; lasting, imperishable.

A chemical compound containing eleven zinc atoms per formula: Zn₁₁.

Not deceased.

Not deceitful.

undeceitfullyadv

In a way that is not deceitful.

undeceivableadj

Not deceivable.

undeceivablenessnoun

The quality of being undeceivable.

undeceivablyadv

In an undeceivable way.

To free from misconception, deception or error.

One who undeceives.

undeceivethverb

third-person singular simple present indicative of undeceive

undeceleratedadj

Not decelerated.

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 114. 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.