We don't have synonyms for duratives yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are curative, durative and curatives.
(adj) :
(linguistics) Of or pertaining to the aspect of a verb that expresses continuing action; continuative. Part of the imperfective aspect, as opposed to the perfective aspect, of verbs.
(n) :
(linguistics) This aspect, or a verb in this aspect; a continuative.
(adj) :
(linguistics) Of or pertaining to the aspect of a verb that expresses continuing action; continuative. Part of the imperfective aspect, as opposed to the perfective aspect, of verbs.
(n) :
(linguistics) This aspect, or a verb in this aspect; a continuative.