The phrase "stick up" can mean a robbery or hold-up with the use of a weapon, but it can also have other meanings. When used in a non-criminal context "stick up" can be replaced with the word "stand up," which refers to an object that is projecting straight up from a surface. For a more casual tone, you can use "jut out." You may also consider "lift up," "carry up," "raise up," or "prop up," depending on the context. In some cases, "stick up" can be replaced with more specific words such as "post," "pole," or "flagpole." Using synonyms like these can help you avoid repetition and more accurately convey your message.