gruesome vs macabre

gruesome and macabre both are adjectives.

Word	Noun	Adjective	Verb	Adverb
gruesome	No	Yes	No	No
macabre	No	Yes	No	No

As adjectives, gruesome and macabre are synonyms defined as:

Other synonyms of gruesome include ghastly, grim, grisly, sick.

gruesome (adjective)	macabre (adjective)
shockingly repellent; inspiring horror	shockingly repellent; inspiring horror