We don't have synonyms for monocots yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are monocot, monocotyl and monocotic.
(n) :
(botany) Alternative form of monocotyledon. [(botany) Any plant whose seedlings typically have one cotyledon (seed leaf) (in contrast to the two cotyledons typical of dicots), thereby belonging to the taxonomic monocots, formerly variously known as Monocotyledones, Monocotyledonae, or Liliopsida, a class in the angiosperms (Angiospermae), the flowering plants.]
(n) :
(botany) Alternative form of monocotyledon. [(botany) Any plant whose seedlings typically have one cotyledon (seed leaf) (in contrast to the two cotyledons typical of dicots), thereby belonging to the taxonomic monocots, formerly variously known as Monocotyledones, Monocotyledonae, or Liliopsida, a class in the angiosperms (Angiospermae), the flowering plants.]