We don't have synonyms for ravines yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ravine, ravined and ravings.
(n) :
A deep narrow valley or gorge in the earth's surface worn by running water.
(n) :
(archaic) Alternative form of raven (“rapine, rapacity; prey, plunder”). [(countable) Any of several, generally large and lustrous black species of birds in the genus Corvus, especially the common raven (Corvus corax).]
(n) :
A deep narrow valley or gorge in the earth's surface worn by running water.
(n) :
(archaic) Alternative form of raven (“rapine, rapacity; prey, plunder”). [(countable) Any of several, generally large and lustrous black species of birds in the genus Corvus, especially the common raven (Corvus corax).]