menacing vs threatening

menacing and threatening both are adjectives.

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

As adjectives, menacing and threatening are synonyms defined as:

menacing and threatening: threatening or foreshadowing evil or tragic developments

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

menacing (adjective)	threatening (adjective)
threatening or foreshadowing evil or tragic developments	threatening or foreshadowing evil or tragic developments
	darkened by clouds