centner vs metric hundredweight

centner and metric hundredweight both are nouns.

Word	Noun	Adjective	Verb	Adverb
centner	Yes	No	No	No
metric hundredweight	Yes	No	No	No

As nouns, centner and metric hundredweight are synonyms defined as:

centner and metric hundredweight: a unit of weight equal to 100 kilograms in the metric system

Other synonyms of centner include doppelzentner, hundredweight.

centner (noun)	metric hundredweight (noun)
a United States unit of weight equivalent to 100 pounds	a unit of weight equal to 100 kilograms in the metric system
in some European countries: a unit of weight equivalent to 50 kilograms
a unit of weight equal to 100 kilograms in the metric system