We don't have synonyms for avadavats yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are amadavat, avadavat and amadavats.
(n) :
Any of various estrildid finches of the genus Amandava, especially the red avadavat, Amandava amandava, of India and Southeast Asia, commonly kept and bred as a cagebird; also known as Java sparrow.
(n) :
Any of various estrildid finches of the genus Amandava, especially the red avadavat, Amandava amandava, of India and Southeast Asia, commonly kept and bred as a cagebird; also known as Java sparrow.