A believer is someone who has faith in a higher power or spiritual belief system. An ENTHUSIAST is an individual who is passionate and excited about something, while a DEVOTEE is someone who is devoted to a particular cause or person. IMA, IST, ITE, and TRUE are all suffixes that can be added to the word 'believer' to create new words such as 'believerism, ' 'believerist, ' 'believerite, ' and 'believertrue.' A deist is someone who believes in a higher power but does not accept any religious doctrine, while a MYSTIC is someone who seeks a deeper understanding of the universe through spiritual practices. A THEIST is someone who believes in a higher power and follows a particular religion, while an APOSTLE is someone who is devoted to spreading the teachings of a particular religion.