Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb terrify

1 sense of terrify

Sense 1
terrify, terrorize, terrorise -- (fill with terror; frighten greatly)
       => frighten, fright, scare, affright -- (cause fear in; "The stranger who hangs around the building frightens me"; "Ghosts could never affright her")

Antonyms of adj terrifying

1 sense of terrifying

Sense 1
terrific, terrifying -- (causing extreme terror; "a terrifying wail")

INDIRECT (VIA alarming) -> unalarming -- (not alarming; assuaging alarm)

Similarity of adj terrifying

1 sense of terrifying

Sense 1
terrific, terrifying -- (causing extreme terror; "a terrifying wail")
       => alarming (vs. unalarming) -- (frightening because of an awareness of danger)