Nine days' wonder is a phrase that originates from the Elizabethan era, referring to something that is "temporarily popular" or "fleeting interest". If you're looking for other words to describe this phenomenon, you can use terms like flash in the pan, short-lived curiosity, passing fancy, and transient attraction. These terms are excellent for describing situations where something initially sparks people's attention or fascination but quickly fades away. Whether you're writing an article about current events or describing a recent trend, it's essential to have a variety of words to convey these types of transitory occurrences. So, use these synonyms to expand your vocabulary and better express fleeting marvels.