rigid is a valid English word

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

Meanings

Adjective (COMPARABLE)

Stiff, rather than flexible.
• Synonym: inflexible
Fixed, rather than moving.
• Antonym: moving
Rigorous and unbending.

Noun (COUNTABLE)

(aviation) An airship whose shape is maintained solely by an internal and/or external rigid structural framework, without using internal gas pressure to stiffen the vehicle (the lifting gas is at atmospheric pressure); typically also equipped with multiple redundant gasbags, unlike other types of airship.
• The rigid could reach the greatest sizes and speeds of any airship, but was expensive to build and bulky to store. Rigids fell out of favor after the R101 and Hindenburg disasters made the type seem unsafe to the travelling public.
A bicycle with no suspension system.

rigid is a Scrabble valid word

r1i1g2i1d2

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

rigid is an iScramble, QuickWords valid word

r1i2g3i4d5

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

Same letters words (Anagrams)

• none

Same letters plus one

• BIRGID
• BRIGID
• DIGRIZ
• DINGIR
• DINGRI
• DIRIGE
• FRIGID
• GLIRID
• INGRID
• RIDGIL
• RIDING
• RIGIDS
• SIGRID
• WIGRID

Same letters minus one

• DIGI
• GIRD
• GIRI
• GRID
• IDGI
• IRID