More cobalt can also be referred to as additional cobalt, extra cobalt, increased cobalt, and higher cobalt content. These synonyms can be used interchangeably depending on the context of the sentence. For instance, if a company has increased the amount of cobalt in their product, one can say they added more cobalt or increased the cobalt content. Similarly, if a scientist is conducting research that requires higher levels of cobalt, they can say they need additional or extra cobalt. These synonyms add versatility and flexibility in language usage while conveying the same meaning as "more cobalt".