Princeton's WordNet
frolic, lark, rollick, skylark, disport, sport, cavort, gambol, frisk, romp, run around, lark about(verb)
play boisterously
Synonyms:
boast, sport, lark, frolic, romp, run around, amuse, lark about, divert, rollick, disport, cavort, frisk, gambol, feature, skylark
Wiktionary
cavort(verb)
Synonyms:
frolic, prance, romp, caper
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