ghastly vs grim

ghastly and grim both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ghastly	No	Yes	No	No
grim	No	Yes	No	No

As adjectives, ghastly and grim are synonyms defined as:

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

ghastly (adjective)	grim (adjective)
shockingly repellent; inspiring horror	shockingly repellent; inspiring horror
gruesomely indicative of death or the dead	filled with melancholy and despondency
	causing dejection
	not to be placated or appeased or moved by entreaty
	harshly ironic or sinister
	harshly uninviting or formidable in manner or appearance