noun. One who is filled with enthusiasm; one who is ardently absorbed in an interest or pursuit.

noun. A zealot; a fanatic.

noun. One who imagines he has special or supernatural converse with God, or that he is divinely instructed or commissioned.

noun. One who is given to or characterized by enthusiasm; one whose mind is excited and whose feelings are engrossed in devotion to a belief or a principle, or the pursuit of an object; one who is swayed to a great or an undue extent by emotion in regard to anything; a person of ardent zeal.

noun. [capitalized] Eccles., one of the names given to a Euchite.

noun. One moved or actuated by enthusiasm; as: (a) One who imagines himself divinely inspired, or possessed of some special revelation; a religious madman; a fanatic. (b) One whose mind is wholly possessed and heated by what engages it; one who is influenced by a peculiar; fervor of mind; an ardent and imaginative person.

noun. A person filled with or guided by enthusiasm.

noun. A person exhibiting over-zealous religious fervour.

noun. an ardent and enthusiastic supporter of some person or activity

noun. a person having a strong liking for something

"Model train enthusiast David K. Smith has built a miniscule train layout which works – the train travels in an ellipse, including through a “mountain.”"

-phile  

enthuse  enthusiasm  enthusiastic  

admirer  adventurer  artist  collector  correspondent  

Don Quixote  Quixote  activist  addict  addict