There are several synonyms for the phrase "be noticeable", each of which conveys a slightly different nuance. One common alternative is "stand out", which emphasizes the idea of being distinct or unique. Another option is "catch the eye", which implies that something is visually striking or attention-grabbing. "Attract attention" suggests that something is deliberately seeking notice, whereas "draw the eye" implies a more passive action on the part of the observer. "Be conspicuous" and "be prominent" both suggest that something is highly visible or noticeable, but "conspicuous" may carry a negative connotation of being too obvious or attention-seeking.