subvent vs subvention

subvent is not a noun while subvention is a noun.

Word	Noun	Adjective	Verb	Adverb
subvent	No	No	Yes	No
subvention	Yes	No	Yes	No

As verbs, subvent and subvention are synonyms defined as:

Other synonyms of subvent include underwrite.

subvent (noun)	subvention (noun)
	the act or process of providing aid or help of any sort
	grant of financial aid as from a government to an educational institution

subvent (verb)	subvention (verb)
guarantee financial support of	guarantee financial support of