This game is a lot of fun and really rewards engaging with it deeply. Are you using a specific word list? Because some words that I think should be valid (pram, chum) are being rejected and that can make planning a board out frustrating.
Glad you're having fun! We use a specific word list (which are mainly common words and no plurals) to keep the game accessible and straightforward to all , so not every possible word is included. I see how 'pram' and 'chum' might seem like good fits and I will review the word list .
Fun fact: Sometimes a quick shuffle can reveal valid words!