lackluster is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

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Meanings

Adjective (COMPARABLE)

Comparative Superlative
more lackluster most lackluster
    Lacking brilliance or intelligence. Having no shine or lustre; dull. (figurative) Not exceptional; not worthy of special merit, attention, or interest; having no vitality.

Noun (COUNTABLE AND UNCOUNTABLE)

Singular Plural
lackluster lacklusters
    (uncountable) Lack of brightness or points of interest. (countable) A person or thing of no particular brilliance or intelligence.

lackluster is a Scrabble valid word


lackluster is an iScramble valid word


lackluster is an QuickWords valid word


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Same letters words (Anagrams)


Same letters plus one


Same letters minus one