We don't have synonyms for helme yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are helm, helve and heme.
(n) :
Obsolete spelling of helm. [(nautical) The tiller (or, in a large ship, the wheel) which is used to control the rudder of a marine vessel; also, the entire steering apparatus of a vessel.]
(n) :
Obsolete spelling of helm. [(nautical) The tiller (or, in a large ship, the wheel) which is used to control the rudder of a marine vessel; also, the entire steering apparatus of a vessel.]