The word "Romancist" is not commonly used in English, but it is spelled using the phonetic sounds of the language. The first sound is /r/, followed by the long "o" sound represented by /oʊ/. The third syllable is pronounced with a short "a" sound, /æ/. The final syllable is /sɪst/. The word refers to a writer or creator of romantic fiction, though the more common term is "romance novelist".
One who writes romances; one who invents wild and extravagant stories of love or war.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.