Synonyms for Topi (same or very similar meaning)
WordNet sense 1 (a lightweight hat worn in tropical countries for protection from the sun):
topee, pith hat, pith helmet, sun helmet
WordNet sense 2 (a large South African antelope; considered the swiftest hoofed mammal):
sassaby, Damaliscus lunatus
From the ODE community, based on WordNet
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