saturnine vs dour

saturnine and dour both are adjectives.

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

As adjectives, saturnine and dour are synonyms defined as:

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

saturnine (adjective)	dour (adjective)
showing a brooding ill humor	showing a brooding ill humor
bitter or scornful	stubbornly unyielding
	harshly uninviting or formidable in manner or appearance