How to check if user input contains one word from a list of possible words

Question

I'm making a text adventure and I want to check if the user inputs something that contains one key word out of a list of possible words, and if contains more it will error message. any checks if there are any elements that are true and all checks if all of them are true. How would I go about checking if only one returns true? Is there an if statement I could add to the any?