spiff is a valid English word

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

Meanings

Adjective (COMPARABLE)

(archaic or regional Yorkshire) Neat, smartly dressed, attractive.

Noun (COUNTABLE AND UNCOUNTABLE)

(uncountable) Attractiveness or charm in dress, appearance, or manner.
• Without a diploma, he relies on spiff alone to climb the corporate ladder.
(countable archaic slang) A well-dressed man; a swell.
(countable commerce slang) A bonus or other remuneration, given for reaching a sales goal or promoting the goods of a particular manufacturer. Originally from textile retailing, a percentage given for selling off surplus or out-of-fashion stock, of which the sales person could offer part as a discount to a customer.

Verb

(transitive informal) (usually with up or out) To make spiffy (attractive, polished, or up-to-date)
(transitive commerce slang) To reward (a salesperson) with a spiff or bonus.
(transitive commerce slang) To attach a spiff or bonus to the selling of (a product)

spiff is a Scrabble valid word

spiff

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

spiff is an iScramble, QuickWords valid word

spiff

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

Same letters words (Anagrams)

• PIFFS

Same letters plus one

• SPIFFS
• SPIFFY
• SPLIFF

Same letters minus one

• FFIS
• FFPS
• FIPS
• IPFS
• ISFP
• ISPF
• PFIS
• PIFF