The phrase "summons back" is often used to describe a call or request for someone to return to a particular place or situation. However, there are many different words and phrases that can be used to convey a similar idea. Some possible synonyms might include "recall," "bring back," "fetch," "retrieve," "call for," "request the presence of," "ask to return," "require the presence of," or simply "summon." Depending on the context, any of these phrases might be appropriate to use in place of "summons back" to convey the same basic meaning.