There are many possible synonyms for the non-existent word "NEBR." Without context or information about what "NEBR" might mean, it is difficult to provide a comprehensive list of options. However, some potential replacements for "NEBR" could include similar-sounding words like "neb" (a bird's beak or nose), "nebula" (a cloud of gas and dust in space), or "nebbish" (a timid or ineffectual person). Alternately, one might look for synonyms for words that could be represented by "NEBR" as an acronym or abbreviation-for instance, "National Education Board Review" could be shortened to "NEBR." Ultimately, the choice of a synonym will depend heavily on context and intended meaning.