meat grinder vs grinder

meat grinder and grinder both are nouns.

Word	Noun	Adjective	Verb	Adverb
meat grinder	Yes	No	No	No
grinder	Yes	No	No	No

As nouns, grinder is a hypernym of meat grinder; that is, grinder is a word with a broader meaning than meat grinder:

Other hypernyms of meat grinder include mill, milling machinery.

meat grinder (noun)	grinder (noun)
any action resulting in injury or destruction	a machine tool that polishes metal
a mill for grinding meat	machinery that processes materials by grinding or crushing
	grinding tooth with a broad crown; located behind the premolars
	a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States