We don't have synonyms for swainmote yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are sweinmote, swanimote and wainbote.
(n) :
(UK, law, obsolete or historical) A court held before the verderers of the forest as judges, by the steward of the court, three times a year, the swains or freeholders of the forest composing the jury.
(n) :
(UK, law, obsolete or historical) A court held before the verderers of the forest as judges, by the steward of the court, three times a year, the swains or freeholders of the forest composing the jury.