Subvene is a verb that means to provide financial assistance or support to someone or something. There are several synonyms for this word, including fund, back, finance, support, sponsor, underwrite, and subsidize. These words can be used interchangeably with subvene, depending on the context of the sentence. For example, "The government decided to subvene the small business with a grant," can be rewritten as, "The government decided to fund the small business with a grant." These synonyms can help add variety to your writing and make your writing clearer for your readers.