What is Sceptic ?
Sceptic is (noun) 1. a person who doubts the truth of religion In the area of religious belief, he is something of a sceptic. 2. a person who always doubts the truth of what he or she is told I am a sceptic when it comes to astrology. (NOTE: [all senses] The US spelling is skeptic.)
source: Easier English, Student Dictionary Upper Intermediate Level