We don't have synonyms for dairy cow yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are dry cow and dairy cows.
(n) :
Any breed of cow bred for the ability to produce large quantities of milk, from which dairy products are made; an individual cattle beast of such a breed; especially, a female cow who has calved and lactated.
(n) :
A black-and-white varietal of the Porcellio laevis woodlouse.
(n) :
Any breed of cow bred for the ability to produce large quantities of milk, from which dairy products are made; an individual cattle beast of such a breed; especially, a female cow who has calved and lactated.
(n) :
A black-and-white varietal of the Porcellio laevis woodlouse.