We don't have synonyms for deasil yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are deosil.
(n) :
A motion towards the right, in the direction of the hands of a clock or of the apparent motion of the sun (in the northern hemisphere); a turning in this direction.
(n) :
A motion towards the right, in the direction of the hands of a clock or of the apparent motion of the sun (in the northern hemisphere); a turning in this direction.