Synonyms for Unai (same or very similar meaning)
WordNet sense 1 (a sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot):
unau, two-toed sloth, Choloepus hoffmanniWordNet sense 2 (relatively small fast-moving sloth with two long claws on each front foot):
Choloepus didactylusFrom the ODE community, based on WordNetadd/edit