We don't have synonyms for misletoe yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are mistletoe, misseltoe and midleton.
(n) :
Archaic form of mistletoe. [(countable, uncountable) Any of numerous hemiparasitic evergreen plants of the order Santalales with white berries that grow in the crowns of apple trees, oaks, and other trees, such as the European mistletoe (Viscum album) and American mistletoe or eastern mistletoe (Phoradendron leucarpum).]
(n) :
Archaic form of mistletoe. [(countable, uncountable) Any of numerous hemiparasitic evergreen plants of the order Santalales with white berries that grow in the crowns of apple trees, oaks, and other trees, such as the European mistletoe (Viscum album) and American mistletoe or eastern mistletoe (Phoradendron leucarpum).]