Letting off steam is a phrase used to describe the act of releasing built up emotions or energy. This can be done in a variety of ways, such as talking to someone, exercising, or even screaming into a pillow. The crossword solutions for the term 'lets off steam' are OVERHEATS (9 letters), VENTS (5 letters), ERUPTS (6 letters), and COOLS (5 letters). Overheating is when something becomes too hot, and VENTS are openings that allow air to flow in and out. Erupting is when something suddenly bursts out, and cooling is the process of reducing heat. All of these words relate to the phrase 'letting off steam' in that they all involve releasing energy or emotion in some way.