We don't have synonyms for hakas yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are halas, haras and khakas.
(n) :
A group dance of New Zealand's Maori people featuring rhythmic chanting, vigorous facial and arm movements, and foot stamping. Traditionally a war dance, today it is also performed to welcome guests, as a mark of respect at occasions such as commemorations and funerals, as a challenge to opposing teams at sports events, and for artistic purposes.
(n) :
A group dance of New Zealand's Maori people featuring rhythmic chanting, vigorous facial and arm movements, and foot stamping. Traditionally a war dance, today it is also performed to welcome guests, as a mark of respect at occasions such as commemorations and funerals, as a challenge to opposing teams at sports events, and for artistic purposes.