There are various words that could be used as synonyms for the phrase "walked out." Some of the popular ones include departed, left, exited, withdrew, abandoned, relinquished, and deserted. These words are often used to describe situations where someone has left a place or a situation suddenly and unexpectedly. For example, if someone decides to leave their job suddenly, they could be said to have "walked out" or "withdrawn" from the company. In conclusion, knowing these synonyms could help writers or speakers to express themselves better and choose more appropriate words in their communication.