menacing vs sinister

menacing and sinister both are adjectives.

Word	Noun	Adjective	Verb	Adverb
menacing	No	Yes	No	No
sinister	No	Yes	No	No

As adjectives, menacing and sinister are synonyms defined as:

menacing and sinister: threatening or foreshadowing evil or tragic developments

Other synonyms of menacing include baleful, forbidding, minacious, minatory, ominous, threatening.

menacing (adjective)	sinister (adjective)
threatening or foreshadowing evil or tragic developments	threatening or foreshadowing evil or tragic developments
	stemming from evil characteristics or forces; wicked or dishonorable
	on or starting from the wearer's left