insidious is a valid English word

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

Meanings

Adjective (COMPARABLE)

Producing harm in a stealthy, often gradual, manner.
Intending to entrap; alluring but harmful.
• Hansel and Gretel were lured by the witch’s insidious gingerbread house.
(nonstandard) Treacherous.
• The battle was lost due to the actions of insidious defectors.

insidious is a Scrabble valid word

insidious

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

insidious is an iScramble, QuickWords valid word

insidious

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

Same letters words (Anagrams)

• none

Same letters plus one

• LOUISINIDS

Same letters minus one

• SINUSOID