pinscher vs monkey dog

pinscher and monkey dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
pinscher	Yes	No	No	No
monkey dog	Yes	No	No	No

As nouns, monkey dog is a hyponym of pinscher; that is, monkey dog is a word with a more specific, narrower meaning than pinscher:

pinscher: any of three breeds of dogs whose ears and tail are usually cropped
monkey dog: European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle

Other hyponyms of pinscher include Doberman, Doberman pinscher, miniature pinscher, affenpinscher, monkey pinscher.

pinscher (noun)	monkey dog (noun)
any of three breeds of dogs whose ears and tail are usually cropped	European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle