glum vs moody

glum and moody both are adjectives.

Word	Noun	Adjective	Verb	Adverb
glum	No	Yes	No	No
moody	No	Yes	No	No

As adjectives, glum and moody are synonyms defined as:

Other synonyms of glum include dark, dour, glowering, morose, saturnine, sour, sullen.

glum (adjective)	moody (adjective)
moody and melancholic	subject to sharply varying moods
showing a brooding ill humor	showing a brooding ill humor