How many words start with ST?

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

What is the highest scoring word that start with ST?

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

STABS, STACK, STADE, STAFF, STAGE, STAGS, STAGY, STAID, STAIG, STAIN and 172 more on this page.

There are 182 of them. The highest scoring is STYMY at 13 points in Scrabble, and the set averages 6.9.

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.

STATE noun the territory occupied by one of the constituent administrative districts of a nation
STORE noun a mercantile establishment for the retail sale of goods or services
STILL adjective not in physical motion
STOCK noun the capital raised by a corporation through the issue of shares entitling holders to an ownership interest (equity)
START verb take the first step or steps in carrying out an action
STUDY noun a detailed critical inspection
STAFF noun personnel who assist their superior in carrying out an assigned task
STORY noun a message that tells the particulars of an act or occurrence or course of events
STYLE noun how something is done or how it happens
STUFF noun the tangible substance that goes into the makeup of a physical object

Definitions from Open English WordNet, CC BY 4.0.

All of them: Word lists.