Difference between Gruesome and Ghastly

GRUESOME vs GHASTLY: ADJECTIVE

In a ghastly manner; dreadfully; hideously; with a deathlike aspect.
Dreadful or deathly in aspect or look; deathlike; haggard; shocking.
Deathly in import or suggestion; morally dreadful or shocking.
Synonyms Ghastly, Grim, Grisly, Haggard, Hideous; pale, wan, cadaverous, frightful. Hideous may apply to sound, as a hideous noise; the others not. All in modern use apply primarily to sight and secondarily to mental perception, except haggard, which connotes sight only. Ghastly, as it is most commonly used, means deathly pale, deathlike, referring to the countenance, but its signification has been extended to denote anything that is suggestive of death, or even repulsive and shocking, as Milton's “mangled with ghastly wounds” (P. L., vi. 368), “a ghastly smile” (Milton, P. L., ii. 846), a ghastly jest. Grim characterizes a rigid cast of countenance, indicating a severe, stern, or even ruthless disposition. Grisly refers to the whole form or aspect, especially when dark, forbidding, or such as to inspire terror. Haggard adds to the idea of paleness of countenance that of being wasted by famine or protracted mental agony. Hideous, used of looks, applies to the whole form or scene, and means simply repulsive, extremely unpleasant to see: as, hideous features; a hideous scene. See pale.
Shockingly repellent
Inspiring horror

Heinous, Frightening, Terrifying, Ghoulish, Harrowing, Chilling, Shocking, Brutal, Horrifying, Horrific, Alarming, Grim, Macabre, Ghastly, Grisly

Horrible, Horrid, Horrendous, Horrific, Horrifying, Dreadful, Hideous, Offensive, Charnel, Alarming, Sepulchral, Grim, Macabre, Grisly, Gruesome

Heinous, Frightening, Terrifying, Ghoulish, Harrowing, Chilling, Shocking, Brutal, Horrifying, Horrific, Alarming, Grim, Macabre, Ghastly, Grisly

Horrible, Horrid, Horrendous, Horrific, Horrifying, Dreadful, Hideous, Offensive, Charnel, Alarming, Sepulchral, Grim, Macabre, Grisly, Gruesome

This can include pornography, gruesome and controversial images.
You shall die a most painful, gruesome death.
Fragile is a gruesome tale full of suspense.
Ok, a little gruesome, but imagine it anyways.
However Bartholomew died, it was probably pretty gruesome.
For there lies a most gruesome tableau below.
Hangings were often botched, resulting in gruesome spectacles.
You win first gruesome car accident photos dedicated.
The pommel boasts a gruesome skull, and its guard displays a gruesome demon head on either side.
Gruesome definition, causing great horror; horribly repugnant; grisly: the site of a gruesome murder.