unalterable is a valid English word

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

Meanings

Adjective (COMPARABLE)

Incapable of being altered, or of changing.
Irreversible, irrevocable.

unalterable is a Scrabble valid word

u1n1a1l1t1e1r1a1b3l1e1

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

unalterable is an iScramble, QuickWords valid word

u1n2a3l4t5e6r7a8b9l10e11

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

Same letters words (Anagrams)

• UNALERTABLE
• UNRELATABLE

Same letters plus one

• UNTRAVELABLE

Same letters minus one

• UNRATEABLE
• UNTEARABLE