| adjective | denying or questioning the tenets of especially a religion “a skeptical approach to the nature of miracles” |
| adjective | marked by or given to doubt “a skeptical attitude” |
| skeptic | noun | someone who habitually doubts accepted beliefs |
| skepticism | noun | the disbelief in any claims of ultimate knowledge |
| scepticism | noun | the disbelief in any claims of ultimate knowledge |
| sceptic | noun | someone who habitually doubts accepted beliefs |