When it comes to describing a tricky or confusing situation, the term "mind-twister" can be a useful descriptor. However, there are plenty of other options available if you're looking to mix up your vocabulary. Some possible synonyms for "mind-twister" might include: brain-teaser, puzzle, conundrum, enigma, riddle, quandary, challenge, perplexity, labyrinth, maze, or head-scratcher. Depending on the context and tone you're going for, any of these terms could be an effective replacement for "mind-twister" in your writing or conversation.