Synonyms of aghast

2 Syllables
dismayed, scared, fearful, stunned, speechless, agog, shocked, startled, anxious, afraid
3 Syllables
amazed, appalled, horror-struck, horrified, aflutter, confounded, frightened, alarmed, terrified, panicky, thunderstruck, awestruck, tongue-tied, astounded, dumbfounded, agape
4 Syllables
disappointed, overwhelmed, goose-bumpy, astonished, bewildered, percussive