optional is a valid English word

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

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Meanings

Adjective (NOT COMPARABLE)

Not comparable
    Not compulsory; left to personal choice; elective.

Noun (COUNTABLE)

Singular Plural
optional optionals
    Something that is not compulsory, especially part of an academic course. (programming sometimes capitalized) In various programming languages, a kind of variable that is assigned a specific data type but may or may not hold an actual value.

optional is a Scrabble valid word


optional is an iScramble valid word


optional is an QuickWords valid word


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Same letters words (Anagrams)


Same letters plus one


Same letters minus one