-ast
a suffix of nouns that denote a person who practices or is concerned with something, or holds certain principles, doctrines, etc.: enthusiast;ecdysiast; gymnast.
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Here’s When To Capitalize WordsThere are a few specific cases where words should be capitalized. They’re easy to remember. In English, capital letters are most commonly used at the start of a sentence, for the pronoun I, and for proper nouns. The First Word of a Sentence You should always capitalize the first letter of the first word in a sentence, no matter what the word is. Take, for …
Origin of -ast
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019