We don't have synonyms for amaltheia yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are amalthea, apatheia and amalthean.
(n) :
Alternative form of Amalthea (Greek goddess) [(Greek mythology) The most frequently mentioned foster mother of Zeus, sometimes represented as the goat who suckled the infant-god in a mountain cave, sometimes as a goat-tending nymph.]
(n) :
Alternative form of Amalthea (Greek goddess) [(Greek mythology) The most frequently mentioned foster mother of Zeus, sometimes represented as the goat who suckled the infant-god in a mountain cave, sometimes as a goat-tending nymph.]