IPA: /ˈprɒmptbʊk/
KK: /ˈprɑmptˌbʊk/
A special book that contains the script of a play along with notes and instructions for the actors and stage crew.
The prompter followed the promptbook closely to ensure the performance went smoothly.
Promptbook → It is formed from "prompt" (from Latin "promptus", meaning ready or prepared) and "book" (from Old English "bōc", meaning a written work or text). The word "promptbook" refers to a book that contains the text or cues for a performance, indicating readiness for the actors.
Think of being 'ready' ('prompt') with a 'written work' ('book') that helps guide a performance.
No commonly confused words.