When it comes to finding synonyms for "trips on," there are plenty of options available. Some great alternatives include "stumbles over," "gets caught on," "falls upon," "accidentally steps on," and "knocks into." Each of these phrases offers a slightly different connotation, but all refer to tripping or stumbling in some way. You might use "stumbles over" to describe tripping over an unexpected obstacle, or "gets caught on" to describe getting tangled up in something. "Falls upon" implies a more dramatic fall, while "accidentally steps on" and "knocks into" suggest a smaller, more incidental misstep. Regardless of which synonym you choose, each one will add texture and nuance to your writing.