The term 'vary' can be used to describe a wide RANGE of activities. To MODULATE is to ADJUST the intensity or volume of something, while to METAMORPHOSE is to undergo a complete transformation. To DIVERSIFY is to make something more varied or to introduce variety, while to CONVERT is to CHANGE something from one form to another. To ADJUST is to make small changes to something, while to DEPART is to move away from something. To RANGE is to extend over a certain area, while to CHANGE is to make something different. To DIVERGE is to move away from a common point, while to TURN is to move in a circular direction. Finally, to DIFFER is to be unlike or dissimilar. All of these activities can be used to describe the term 'vary'.