viatication vs buying

viatication and buying both are nouns.

Word	Noun	Adjective	Verb	Adverb
viatication	Yes	No	No	No
buying	Yes	No	No	No

As nouns, buying is a hypernym of viatication; that is, buying is a word with a broader meaning than viatication:

viatication: purchasing insurance policies for cash from terminally ill policy holders
buying: the act of buying

Other hypernyms of viatication include purchasing.

viatication (noun)	buying (noun)
purchasing insurance policies for cash from terminally ill policy holders	the act of buying