We don't have synonyms for sundogs yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are sundog and sun dogs.
(n) :
Alternative form of sun dog. [A bright spot in the sky, usually one of two on a parhelic circle on both sides of the sun (or occasionally above and below it), caused by the refraction of the sun's image through ice crystals.]
(n) :
Alternative form of sun dog. [A bright spot in the sky, usually one of two on a parhelic circle on both sides of the sun (or occasionally above and below it), caused by the refraction of the sun's image through ice crystals.]