Thorpe, most happy to be on speaking terms with a man of General Tilney’s importance, had been joyfully and proudly communicative; and being at that time not only in daily expectation of Morland’s engaging Isabella, but likewise pretty well resolved upon marrying Catherine himself, his vanity induced him to represent the family as yet more wealthy than his vanity and avarice had made him believe them.
There are no more uses of "avarice" in the book.
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We can try both to minimize greed and avarice and to channel them into directions beneficial to society.
She was doomed to an empty life motivated by avarice.