When something is of no concern, it means that it has no relevance or importance to a situation or discussion. Synonyms for this phrase include "irrelevant," "inconsequential," "immaterial," "unimportant," "insignificant," "meaningless," "trivial," "pointless," "unrelated," and "of little consequence." Each of these words can be used interchangeably with "it is of no concern" to express the same sentiment. It's important to choose the right synonym based on the context and tone of the communication to avoid any misunderstandings or confusion.