Brainstorming is a highly effective technique to generate ideas or solutions to a particular problem. However, there are times when using the same term repeatedly can become monotonous. Hence, it's always helpful to know some synonyms for brainstorming. Some of the popular synonyms for brainstorming include ideation, mind-mapping, creative thinking, ideation session, and freethinking. These terms are interchangeable and can be used in place of brainstorming to convey the same idea. Therefore, if you find that you are using the term 'brainstorming' too frequently, try using one of these synonyms to add variation to your writing or speech.