How many words start with DEC?

10, from 5 letters up to 5. All of them are on this page.

What is the highest scoring word that start with DEC?

DECKO at 12 points in Scrabble, and DECKO at 13 in Words With Friends, because the two games score the tiles differently.

DECAD, DECAF, DECAL, DECAY, DECKO, DECKS, DECOR, DECOS, DECOY, DECRY.

10 of them: DECAD, DECAF, DECAL, DECAY, DECKO, DECKS, DECOR, DECOS, DECOY, DECRY.

There are 10 of them. The highest scoring is DECKO at 12 points in Scrabble, and the set averages 10.1.

Most common words first, then the rest A to Z.

The most familiar words on this page and what they mean. Tap any word for its full entry, score and anagrams.

DECOR noun decoration consisting of the layout and furnishings of a livable interior
DECAY noun the process of gradually becoming inferior
DECKS noun form of DECK: any of various platforms built into a vessel
DECAL noun either a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surface
DECAF noun coffee with the caffeine removed
DECOS noun form of DECO: a style of design that was popular in the 1920s and 1930s
DECOY noun a beguiler who leads someone into danger (usually as part of a plot)
DECRY verb express strong disapproval of

Definitions from Open English WordNet, CC BY 4.0.

All of them: Word lists.