Came in to is a phrasal verb that means to enter a place or situation. There are several synonyms for this phrase that can be used to convey the same meaning. These include "arrived," "entered," "stepped into," "walked in," "showed up," "came inside," "crossed the threshold," "went in," "got in," and "made an entrance." These synonyms can add variety to your writing and help you avoid repeating the same phrase over and over again. Knowing multiple synonyms for common phrases can improve your writing and help you communicate your ideas more effectively.