hdd is a valid English word

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

Meanings

Noun (COUNTABLE)

(computing) Initialism of: hard disk drive.
(heating) Initialism of: heating degree day.

hdd is not a Scrabble valid word

hdd

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

hdd is an iScramble, QuickWords valid word

hdd

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

Same letters words (Anagrams)

• DHD

Same letters plus one

• ADHD
• DTHD
• HADD
• HDDS
• HDWD
• HSDD
• HUDD

Same letters minus one

• DD
• DH
• HD