necrophobia (n.)

before vowels, necr-, word-forming element meaning "death, corpse, dead tissue," from Latinized form of Greek nekros "dead body, corpse, dead person," from PIE root *nek- (1) "death."

word-forming element meaning "excessive or irrational fear, horror, or aversion," from Latin -phobia and directly from Greek -phobia "panic fear of," from phobos "fear" (see phobia). In widespread popular use with native words from c. 1800. In psychology, "an abnormal or irrational fear." Related: -phobic.