We don't have synonyms for ganjah yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ganja, gunjah and ganjam.
(n) :
Alternative form of ganja. [(especially India, Singapore, Caribbean) Marijuana, the inflorescence of the Cannabis sativa plant, smoked or ingested for euphoric effect.]
(n) :
Alternative form of ganja. [(especially India, Singapore, Caribbean) Marijuana, the inflorescence of the Cannabis sativa plant, smoked or ingested for euphoric effect.]