When we talk about competition or rivalry, we often use the word "rivalizes" to convey that two or more entities are vying for the same thing. However, there are several other words that can be used as synonyms for "rivalizes." Some of these words include "competes," "challenges," "contests," "duels," "argues," and "opposes." Each of these words conveys a slightly different nuance to the concept of competition. For example, while "competes" is a more general term that can be used to describe any form of competition, "duels" specifically implies a one-on-one contest, while "opposes" implies more of a conflict of ideas or values. Overall, using a variety of synonyms can add richness and depth to your language.