The term "I Q S" is a relatively uncommon term, and it can be difficult to find synonyms for this word. However, there are a few options that could be considered. For example, "intelligence," "intellectual quotient," or simply "intelligence quotient" could be used as synonyms for "I Q S." Additionally, "cognitive ability," "mental acuity," "brainpower," or even "mental prowess" could be used to convey similar meanings. While these terms may not be exact synonyms for "I Q S," they are all related to the concept of intelligence and could be useful for those looking to express similar ideas in their writing or speech.