We don't have synonyms for beltaine yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are beltline, betaine and beltane.
(n) :
Alternative spelling of Beltane. [The first day of May (since 1752); May Day, a Scottish quarter day, sometimes associated by Christians with the nearest Church Feast, the Invention of the Cross (3 May), and Whitsunday (15 May).]
(n) :
Alternative spelling of Beltane. [The first day of May (since 1752); May Day, a Scottish quarter day, sometimes associated by Christians with the nearest Church Feast, the Invention of the Cross (3 May), and Whitsunday (15 May).]