Word Type

Adjective

Verb

Adjective

Proper Noun

The word "dull" can be used as adjective, verb, adjective and proper noun.

Word Relationships

Opposites (Antonyms)

bright bright exciting intelligent lively sharp sharp sharpen shiny

Derived Terms

all work and no play makes Jack a dull boy dull as dishwater dull as ditchwater dull fish dull-headed dull-minded dull-witted dullard dullen dullery dullhead dullish dullness dullsome dullsville dullwit dully fordull never a dull moment semidull too much bed makes a dull head undull undullable undulled

Broader Terms (Hypernyms)

alter change desensitise desensitize modify soften weaken

Manner Of

change weaken

Related Terms

Dollard bedole

Related Terms

blunt boring bright clear cloudy colorless cut exciting heavy indistinct inert intelligent intense interesting lifeless listless luster matte moderate muffled overcast sharp shiny slight sluggish spiritless stupefy unanimated unfeeling unpolished

Similar Terms

arid blunt blunt blunted blunted bovine bovine cloudy colorless colourless deadened deadened desiccate desiccated desiccated drab dreary dreary dulled edgeless edgeless flat heavy humdrum inactive insensitive insensitive lackluster lackluster lacklustre lacklustre leaden leaden lusterless lustreless mat matt matt matte matted monotonous monotonous nonresonant soft spiritless stupid subdued subdued unanimated uninteresting unpolished unreverberant unsaturated unsaturated unsharpened unsharpened

Synonym Network

deadening dense dullen lackluster leaden muffle numb pall sluggish softened thudding

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.