iist is a valid English word

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

Meanings

Proper noun

(India space) Initialism of: Indian Institute of Space Science and Technology.
(software testing) Initialism of: International Institute for Software Testing.

iist is not a Scrabble valid word

i1i1s1t1

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

iist is not an iScramble, QuickWords valid word

i1i2s3t4

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

Same letters words (Anagrams)

• IITS
• ITIS
• SITI

Same letters plus one

• CISTI
• IDIST
• IIITS
• INITS
• INSTI
• INTIS
• ISINT
• ISSIT
• ISTID
• ITIES
• MITIS
• PITIS
• SIIRT
• SIMIT
• SINTI
• SISTI
• STILI
• TIKIS
• TIKSI
• TILIS
• TIPIS
• TISIC
• TISRI
• TITIS
• VISIT
• ZITIS

Same letters minus one

• IIS
• IIT
• ISI
• IST
• ITS
• SIT
• STI
• TIS
• TSI