The phrase "of no moment" means that something is unimportant or insignificant. There are several synonyms for this phrase, including trivial, inconsequential, immaterial, irrelevant, and negligible. These words all convey a sense of something being unimportant or not worth considering. Other synonyms include superficial, meaningless, and frivolous. Regardless of the exact word used, the underlying meaning is the same: the thing in question is not significant and should not be given much attention or thought. When trying to convey the idea that something is unimportant or irrelevant, using one of these synonyms for "of no moment" can be a useful way to clarify your message.