The word purchase is a noun as in something you have bought. It can also be a verb as in to buy.
The word for procure is a verb; verbs don't have companion nouns. References to a companion noun usually only make sense in context. It isn't a grammatical term that stands independent of its context. For example, a test may ask students to circle the adjective in each phrase (such as the old barn) and draw a line from it to its companion noun.
A sentence is "I will procure a little somebody."
The noun form for the adjective horrible is horribleness.
The noun form of the adjective 'prosperous' is prosperousness.A related noun form is prosperity.
The noun form of the adjective obedient is obedience.
The noun form of "punish" is "punishment."
The noun form of "religious" is "religion."
The noun form for the adjective glaring is glaringness. Another noun form is glare.
The noun form of "acrimonious" is "acrimoniousness."
Implication is the noun form of "imply."
To make the cake I had to procure eggs, flower, etc.