The term "onetwos" is quite unique and does not have many common synonyms. However, some phrases that convey the same meaning could be "give and take," "back and forth," or "tit for tat." These terms indicate a reciprocal exchange between two parties, whether it be in conversation or action. Another phrase that could be used is "ping-pong," which refers to the game where players alternate hitting a ball back and forth across a table. While "onetwos" may not have many direct synonyms, it is possible to find similar phrases that convey the same message.