Synonyms for Catchy (same or very similar meaning)
WordNet sense 1 (having concealed difficulty):
tricky
WordNet sense 2 (not easy; requiring great physical or mental effort to accomplish or comprehend or endure):
difficult, hard
WordNet sense 3 (likely to attract attention):
attention-getting
WordNet sense 4 (able to attract interest or draw favorable attention):
appealing
From the ODE community, based on WordNet
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