arduous is a valid English word

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

Meanings

Adjective (COMPARABLE)

Needing or using up much energy; testing powers of endurance.
• The movement towards a peaceful settlement has been a long and arduous political struggle.
(obsolete) burning; ardent
Difficult or exhausting to traverse.

arduous is a Scrabble valid word

a1r1d2u1o1u1s1

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

arduous is an iScramble, QuickWords valid word

a1r2d3u4o5u6s7

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

Same letters words (Anagrams)

• none

Same letters plus one

• SOUDAGUR

Same letters minus one

• AUROUS
• DOUARS
• DUROUS