I suspect English language is not taught in Indiana. (Neither is science, math, history, geography...) The difference between a noun and an adjective used in compound form - vice-_____ - (originally from the Latin, genitive, preposition vicis which means instead of, in place of) is too difficult for a mental midget to absorb.

"The liberals can understand everything but people who don't understand them."
Lenny Bruce

"The cleverest of all, in my opinion, is the man who calls himself a fool at least once a month."
Dostoevsky