We don't have synonyms for shamos yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are shamus, samos and shams.
(n) :
Alternative form of shamash (“sexton in a synagogue”). [(Judaism) The candle used to light the other eight candles of a Hanukkah menorah or hanukkiah.]
(n) :
Alternative form of shamash (“candle used to light other candles of a Hanukkah menorah”). [(Judaism) The candle used to light the other eight candles of a Hanukkah menorah or hanukkiah.]
(n) :
Alternative form of shamash (“sexton in a synagogue”). [(Judaism) The candle used to light the other eight candles of a Hanukkah menorah or hanukkiah.]
(n) :
Alternative form of shamash (“candle used to light other candles of a Hanukkah menorah”). [(Judaism) The candle used to light the other eight candles of a Hanukkah menorah or hanukkiah.]