We don't have synonyms for icarus yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are carus, acarus and scarus.
(n) :
(Greek mythology) A Greek mythological figure, son of Daedalus, who escaped from the Cretan labyrinth of Knossos by flying with wings made from feathers and wax, but flew too near to the sun, which melted the wax in the wings, so he fell down and drowned in the Aegean Sea.
(n) :
(Greek mythology) A Greek mythological figure, son of Daedalus, who escaped from the Cretan labyrinth of Knossos by flying with wings made from feathers and wax, but flew too near to the sun, which melted the wax in the wings, so he fell down and drowned in the Aegean Sea.