When you want to express that something or someone is of no importance, you might use the phrase "of no account." However, there are many other synonyms that you can use to convey the same meaning. For example, you could say that something is insignificant, irrelevant, unimportant, or immaterial. You could also describe something as meaningless, trivial, or inconsequential. If you want to emphasize that something is completely without value, you could use words like worthless or futile. When discussing people, you might say that someone is of no consequence, or that they are inconsequential. These synonyms provide a range of options for expressing the idea that something or someone is not worth considering or taking into account.