IPA: //ˈfɪkʃənɪst//
KK: /ˈfɪkʃənɪst/
A person who writes stories that are not true, particularly novels.
The fictionist created a captivating world filled with interesting characters.
Fictionist → It is formed from "fiction" (from Latin *fictio*, meaning the act of making or shaping) and "-ist" (meaning a person who practices or is concerned with something). A fictionist is a person who creates or engages in the act of making stories or narratives that are not real.
Think of someone who is involved in the 'act of making' ('fictio') stories — that's what a fictionist does.