sesquialter is a valid English word

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

Meanings

Adjective (NOT COMPARABLE)

(mathematics archaic) Synonym: sesquialterate, 1½ times.
(music obsolete) Synonym: sesquialteral, of or relating to 1½ notes.

Noun (COUNTABLE)

(music obsolete) Synonym: sesquialtera, a 1½ note.
(music obsolete) Synonym: sesquialtera, an organ stop.

sesquialter is a Scrabble valid word

s1e1s1q10u1i1a1l1t1e1r1

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is not valid in Scrabble ✘
• 20 points

sesquialter is not an iScramble, QuickWords valid word

s1e2s3q4u5i6a7l8t9e10r11

• The word is not valid in iScramble ✘
• The word is not valid in QuickWords ✘
• 66 points

Same letters words (Anagrams)

• none

Same letters plus one

• SESQUIALTERA
• SESQUIALTERS

Same letters minus one

• EQUALISERS
• EQUESTRIAL
• SEQUESTRAL
• SQUEALIEST
• SQUIRELETS