The conversation between human and AI assistant.
[|Human|] Which one among the following three words is different to the others: Novelty, Playful, Irresistible? Why?
[|AI|] The word 'Novelty' is different to the other two words because it is an noun, while the others are adjectives.
[|Human|] 
Which one among the following three words is different to the others: Novelty, Playful, Irresistible? Why?