-S Vocabulary Words Which Aren't Plurals

"Notorious" has a negative connotation not implied by the clue, whereas the term "famous" can be either good or bad (think Gandhi and Genghis Khan) which is a more accurate reflection of the clue as written.

(This quiz was originally titled Singular -S Vocabulary Words).

Perhaps you are referring not so much to the quiz questions as the quiz title (that word is stated with special weight or forcefulness given to something considered important) which has brought about a dangerous but opportune situation, a possible turning-point, possibly resolved by being amended in the direction of something providing the underlying foundation for the idea that the quiz title will now place the direction of your attention to solving word categories of different kinds or sorts despite the previous distraction of the grab-bag of nouns, verbs, prepositions and adverbs being served up for your delectation under the burden of being presented under the umbrella of an unintentionally absurd title. In other words, we hope you like the quiz's new name.