internment vs poundage

internment and poundage both are nouns.

Word	Noun	Adjective	Verb	Adverb
internment	Yes	No	No	No
poundage	Yes	No	No	No

As nouns, internment and poundage are synonyms defined as:

internment and poundage: placing private property in the custody of an officer of the law

Other synonyms of internment include impounding, impoundment.

internment (noun)	poundage (noun)
the act of confining someone in a prison (or as if in a prison)	placing private property in the custody of an officer of the law
placing private property in the custody of an officer of the law	weight expressed in pounds
confinement during wartime	a fee charged for the recovery of impounded animals
	a charge based on weight measured in pounds