glum vs saturnine

glum and saturnine both are adjectives.

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

As adjectives, glum and saturnine are synonyms defined as:

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

glum (adjective)	saturnine (adjective)
moody and melancholic	showing a brooding ill humor
showing a brooding ill humor	bitter or scornful