[satisfice]

By its nature, this game should accept synonyms of the synonyms it is looking for. I offered “bountiful” when the game wanted “abundant.” My answer was not wrong. When it was rejected I instantly lost interest (i.e. motivation, will, desire) to play the game.

[tomek_zemla]

The puzzle is about finding a specific (one) word for each game/question. In your case abundant was the answer. The cursor indicates correct/incorrect word before it is submitted preventing you from giving a good answer - bountiful - which is NOT the solution to this specific puzzle. It's designed to push the students to find alternatives, i.e. yet another word that can be a solution until they find the correct one. In other words it does not accept multiple solutions by design.