viatication vs purchasing

viatication and purchasing both are nouns.

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

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

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

Other hypernyms of viatication include buying.

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