We don't have synonyms for doozer yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are boozer, dozer and doomer.
(n) :
Alternative form of doozy. [(US, colloquial) Something that is extraordinary: often troublesome, difficult or problematic, but sometimes extraordinary in a positive sense.]
(n) :
Alternative form of doozy. [(US, colloquial) Something that is extraordinary: often troublesome, difficult or problematic, but sometimes extraordinary in a positive sense.]