Tendency is a general term used to describe a particular INCLINATION or direction of behavior. GRAIN refers to the smallest unit of a substance, and can be used to describe a tendency to act in a certain way. SET is a group of things that belong together, and can be used to describe a tendency to do something in a certain way. MODE is a way of doing something, and can be used to describe a tendency to act in a certain way. AIM is a goal or purpose, and can be used to describe a tendency to do something with a certain goal in mind. MOOD is an emotional state, and can be used to describe a tendency to act in a certain way due to one's emotional state. FLOW is a continuous movement, and can be used to describe a tendency to act in a certain way over a period of time. INSTINCT is an innate behavior, and can be used to describe a tendency to act in a certain way without conscious thought. APTNESS is the quality of being suitable for a particular purpose, and can be used to describe a tendency to act in a certain way in order to achieve a desired outcome. TIDE is a periodic rise and fall of the sea, and can be used to describe a tendency to act in a certain way over a period of time. WONT is an established custom or HABIT, and can be used to describe a tendency to act in a certain way due to a long-standing HABIT. DRIFT is a slow, gradual change, and can be used to describe a tendency to act in a certain way over a period of time. HABIT is a settled or regular tendency to act in a certain way, and can be used to describe a tendency to act in a certain way due to a long-standing HABIT. TREND is a general direction in which something is developing or changing, and can be used to describe a tendency to act in a certain way due to a current TREND. LEANING is an INCLINATION or preference, and can be used to describe a tendency to act in a certain way due to a personal preference. INCLINATION is a tendency to think or feel in a certain way, and can be used to describe a tendency to act in a certain way due to a personal INCLINATION.