We don't have synonyms for kasha yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pasha, akasha and katha.
"2005: Kristina Pankofska, a Polish exile whom Anna Petrovna paid a gold rouble a month to clean and help, arrived with a pail of hot kasha and two new eggs. -- James Meek, The People's Act of Love (Canongate 2006, p. 171)"
"2005: Kristina Pankofska, a Polish exile whom Anna Petrovna paid a gold rouble a month to clean and help, arrived with a pail of hot kasha and two new eggs. -- James Meek, The People's Act of Love (Canongate 2006, p. 171)"