watchdog vs pinscher

watchdog and pinscher both are nouns.

Word	Noun	Adjective	Verb	Adverb
watchdog	Yes	No	No	No
pinscher	Yes	No	No	No

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

watchdog: a dog trained to guard property
pinscher: any of three breeds of dogs whose ears and tail are usually cropped

Other hyponyms of watchdog include kuvasz, attack dog, housedog, schipperke.

watchdog (noun)	pinscher (noun)
a dog trained to guard property	any of three breeds of dogs whose ears and tail are usually cropped
a guardian or defender against theft or illegal practices or waste