The phrase "stick on" is commonly used to describe something that adheres or attaches to a surface. But there are many synonyms available for this phrase that can help you communicate with more precision and clarity. Some alternatives you might consider include "affix," "attach," "bond," "stick fast," "cling to," "bond with," "hold on," "stay put," "adhere," "stick tightly," and "join to." Each of these phrases has subtle differences in meaning and connotation, so be sure to choose the one that best fits the context and tone of your writing. With a little thought and effort, you can find a more descriptive and engaging way to express your ideas.