We don't have synonyms for angel wing yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are angelwing, angel wings and anglewing.
(n) :
(countable, uncountable) A disease of waterfowl in which the last joint of the wing becomes twisted, causing the wing feathers to point laterally outwards; a wing of this kind.
(n) :
(countable, uncountable) A disease of waterfowl in which the last joint of the wing becomes twisted, causing the wing feathers to point laterally outwards; a wing of this kind.