Rounding out is a common phrase used in English language to describe the completion or the finishing touch of something. This phrase emphasizes the final steps towards completion of something and it is often used in discussions that involve project planning. When looking for synonyms for the phrase rounding out, one might consider terms such as completing, concluding, finishing, polishing off, wrapping up, culmination, perfecting, finalizing, or capping off. These words are often used interchangeably to convey the idea of completing or putting the finishing touches on a project or task. Using these synonyms can help you expand your vocabulary and more effectively communicate your ideas in writing and oral communication.