milcher vs dairy cow

milcher and dairy cow both are nouns.

Word	Noun	Adjective	Verb	Adverb
milcher	Yes	No	No	No
dairy cow	Yes	No	No	No

As nouns, milcher and dairy cow are synonyms defined as:

Other synonyms of milcher include dairy cattle, milch cow, milk cow, milker.

milcher (noun)	dairy cow (noun)
cattle that are reared for their milk	cattle that are reared for their milk