Synonyms of startling

1 Syllable
thest, ther
2 Syllables
troublous, lurid, striking, shocking, theatric
3 Syllables
alarming, dramatic, disturbing, astounding, perturbing, unsettling, upsetting, surprising, mind-boggling, wonderful, uncommon
4 Syllables
histrionical, unlooked-for, unpredicted, tragicomic, astonishing, unexpected, unforeseen