unutterable is a valid English word

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

Meanings

Adjective (COMPARABLE)

Not utterable; incapable of being physically spoken or voiced; unpronounceable.
• Antonym: articulable, enunciable, expressible, pronounceable, sayable, utterable
Incapable of being articulated or expressed; indescribable, inexpressible.
• Synonyms: ineffable, inutterable, unspeakable, utterless, Thesaurus:indescribable
Not allowed to be spoken; taboo, unspeakable.
• Synonyms: unsayable

Noun (COUNTABLE)

Something which is unutterable (incapable of being physically spoken, incapable of being articulated or expressed, etc.).

unutterable is a Scrabble valid word

u1n1u1t1t1e1r1a1b3l1e1

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 13 points

unutterable is an iScramble, QuickWords valid word

u1n2u3t4t5e6r7a8b9l10e11

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 66 points

Same letters words (Anagrams)

• ENTURBULATE

Same letters plus one

• ENTURBULATED
• ENTURBULATES
• UNREBUTTABLE
• UNUTTERABLES

Same letters minus one

• none