The phrase "escaping notice" implies that something is going unnoticed or unnoticed by someone. There are several synonyms that can be used to convey this meaning. One such synonym is "flying under the radar," which implies that something is not attracting attention or scrutiny from others. Another similar term is "slipping through the cracks," which suggests that something has been overlooked or missed due to a lack of attention or care. Other synonyms include "going unnoticed," "slipping by," "evading detection," and "not registering." All of these words and phrases convey the idea that something has escaped notice, underscoring the importance of paying attention to the details.