Some texts reverse the order of the words. A paronomasia or combination of like-sounding words: limoi, loimoi. Especially common in Paul's epistles.
Fearful sights (φοβητρά)
Only here in New Testament, and rare in classical Greek. In Septuagint, Isaiah 19:17. Not confined to sights, but fearful things. Rev., better, terrors. Used in medical language by Hippocrates, of fearful objects imagined by the sick.