The term 'lighten up' can be expressed in a variety of ways, such as dieting, bleaching, fading, and lessening. DIET is a four-letter word that means to eat less or to eat healthily. Bleaching is a six-letter word that means to remove color from something. PALE is a four-letter word that means to become lighter in color. LESSEN is a six-letter word that means to reduce or make smaller. LEAVEN is a six-letter word that means to add air to a substance. FADE is a four-letter word that means to become less intense or to disappear gradually. EASE is a four-letter word that means to make something less difficult or to relax. Enhalo is a six-letter word that means to surround with light. AERATE is a six-letter word that means to add air to a substance. Easeoff is a seven-letter word that means to reduce gradually. Takeiteasy is a ten-letter phrase that means to relax or to not take things too seriously. Toneitdown is a ten-letter phrase that means to reduce the intensity of something. Giveitarrest is an eleven-letter phrase that means to take a break or to rest. Putalildonit is an eleven-letter phrase that means to stop doing something. All of these words and phrases are related to the term 'lighten up' and can be used to express the idea of reducing stress or intensity.