The conversation between human and AI assistant.
[|Human|] Classify the words "happy", "jovial" and "joyful"
[|AI|] All three words, "happy," "jovial," and "joyful" are adjectives that describe positive emotions, and they fall under the category of synonyms for happiness.
[|Human|] 
Classify the words "happy", "jovial" and "joyful"