IPA: //ˈfæntəsaɪzər//
KK: /ˈfæntəˌsaɪzər/
A person who imagines or dreams about things that are not real, often creating elaborate scenarios in their mind.
As a fantasizer, she often daydreamed about adventures in far-off lands.
Fantasizer → It is formed from "fantasy" (from Greek "phantasia", meaning imagination or appearance) and "-izer" (meaning one who performs an action). The word "fantasizer" refers to one who engages in the act of imagining or creating fantasies.
Think of someone who uses their "imagination" (from "phantasia") to create stories or ideas — that's what a fantasizer does.