plunderage vs peculation

plunderage and peculation both are nouns.

Word	Noun	Adjective	Verb	Adverb
plunderage	Yes	No	No	No
peculation	Yes	No	No	No

As nouns, peculation is a hypernym of plunderage; that is, peculation is a word with a broader meaning than plunderage:

plunderage: the act of plundering (especially the embezzlement of goods on shipboard)
peculation: the fraudulent appropriation of funds or property entrusted to your care but actually owned by someone else

Other hypernyms of plunderage include defalcation, embezzlement, misapplication, misappropriation.

plunderage (noun)	peculation (noun)
the act of plundering (especially the embezzlement of goods on shipboard)	the fraudulent appropriation of funds or property entrusted to your care but actually owned by someone else