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Is INSIDIOUSLY a valid Scrabble word?

Yes, INSIDIOUSLY is a valid word in US Scrabble and UK Scrabble, worth 15 points.

Base score before bonus squares; blank tiles score zero.

What does INSIDIOUSLY mean?

  1. adverb

    in a harmfully insidious manner

    “these drugs act insidiously”

Definitions from WordNet 3.1, Princeton University.

Points

15

Scrabble

17

Words With Friends

11

Letters

I (1) + N (1) + S (1) + I (1) + D (2) + I (1) + O (1) + U (1) + S (1) + L (1) + Y (4) = 15 points in Scrabble.

Dictionary status

  • Scrabble (US & Canada)Valid
  • Scrabble (UK & worldwide)Valid
  • Words With FriendsListed

Scrabble lists: NWL2023 (US & Canada) and CSW24 (UK & worldwide). WWF uses our ENABLE reference plus verified additions. “Listed” and “Not listed” describe that reference; check acceptance in the game. Sources reviewed 2026-10-03.

Hooks for INSIDIOUSLY

INSIDIOUSLY has no one-letter front or back hooks in US Scrabble. Adding a single letter to either end does not make another word in that list.

Front hooks0

None — nothing can be added to the front.

Back hooks0

None — nothing can be added to the end.

Words you can make from INSIDIOUSLY

The 60 highest-scoring words using these letters.

Study INSIDIOUSLY and related words

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