We don't have synonyms for insai yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are insei, isai and insa.
(adv) :
(Singlish) Alternative form of inside. [Within or towards the interior of something; within the scope or limits of something (a place), especially a building.]
(adj) :
(Singlish) Alternative form of inside. [Of or pertaining to the inner surface, limit or boundary.]
(n) :
(Singlish) Alternative form of inside. [The interior or inner part.]
(adv) :
(Singlish) Alternative form of inside. [Within or towards the interior of something; within the scope or limits of something (a place), especially a building.]
(adj) :
(Singlish) Alternative form of inside. [Of or pertaining to the inner surface, limit or boundary.]
(n) :
(Singlish) Alternative form of inside. [The interior or inner part.]