How many words start with GLU?

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

What is the highest scoring word that start with GLU?

GLUEY at 9 points in Scrabble, and GLUME at 12 in Words With Friends, because the two games score the tiles differently.

GLUED, GLUER, GLUES, GLUEY, GLUGS, GLUME, GLUMS, GLUON, GLUTE, GLUTS.

10 of them: GLUED, GLUER, GLUES, GLUEY, GLUGS, GLUME, GLUMS, GLUON, GLUTE, GLUTS.

There are 10 of them. The highest scoring is GLUEY at 9 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.

GLUED adjective affixed or as if affixed with glue or paste
GLUES verb form of GLUE: join or attach with or as if with glue
GLUEY adjective having the sticky properties of an adhesive
GLUGS verb form of GLUG: make a gurgling sound as of liquid issuing from a bottle
GLUME noun small dry membranous bract found in inflorescences of Gramineae and Cyperaceae
GLUON noun a gauge boson that mediates strong interaction among quarks
GLUTE noun any one of three large skeletal muscles that form the buttock and move the thigh
GLUTS verb form of GLUT: overeat or eat immodestly

Definitions from Open English WordNet, CC BY 4.0.

All of them: Word lists.