The term PRO'S OPPOSITE can be expressed in several ways, including the seven-letter word AMATEUR, the eight-letter word NEOPHYTE, the seven-letter word AGAINST, the four-letter word TYRO, the three-letter word CON, the four-letter word ANTI, and the four-letter word CONS. An amateur is someone who engages in an activity for pleasure rather than for financial gain, while a NEOPHYTE is someone who is new to a particular activity or field. AGAINST is a preposition that expresses opposition or resistance. A TYRO is someone who is inexperienced or unskilled in a particular activity. CON is a slang term for a confidence trickster or swindler. ANTI is a prefix that means AGAINST or opposed to. CONS is a plural form of CON. TYROS is a plural form of TYRO.