We don't have synonyms for dolmens yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are dolmen and dolmans.
(n) :
(historical; strictly) A prehistoric megalithic tomb consisting of a capstone supported by two or more upright stones, most having originally been covered with earth or smaller stones to form a barrow.
(n) :
(loosely) Any megalithic tomb, including passage graves and wedge tombs.
(n) :
(historical; strictly) A prehistoric megalithic tomb consisting of a capstone supported by two or more upright stones, most having originally been covered with earth or smaller stones to form a barrow.
(n) :
(loosely) Any megalithic tomb, including passage graves and wedge tombs.