stiffen is a valid English word

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

Meanings

Verb

(transitive) To make stiff.
(intransitive) To become stiff.

stiffen is a Scrabble valid word

stiffen

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

stiffen is an iScramble, QuickWords valid word

stiffen

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

Same letters words (Anagrams)

• INFEFTS

Same letters plus one

• FIFTEENS
• NIFFIEST
• SNIFFEST
• SNIFFETH
• STIFFENS

Same letters minus one

• FEINTS
• FINEST
• INFEFT
• INFEST
• STEFFI
• STEFIN