What is the Greek word for thorn?

Answer 1

I assume you are asking from 2 Corinthians 12:7, where the Scripture says that a "thorn in the flesh" was given to the Apostle Paul to keep him humbled.

The Greek word used for thorn is "skolops" and is found only this one time in the New Testament.

Marvin Vincent (Vincent's Word Studies in the New Testament, vol III, p 354-55) writes that the word is "frequent in classical Greek in the sense of a pale or stake ... the figure is that of the impaling-stake." Vincent goes on to explain that there is disagreement among scholars as to what this "thorn" was and even whether it was physical, mental or spiritual.

Answer 2

The word for thorn is αγκάθι or agathi with the accent on the second 'a'.