The term 'LENGTHENING' refers to a process of making something longer. This can be achieved through various methods, such as INCREASE (8 letters), ENLARGEMENT (11 letters), EXTENDING (9 letters), ELONGATION (10 letters) and EXTENSION (9 letters). All of these terms refer to the same concept of making something longer, but they each have slightly different nuances. For example, INCREASE implies a gradual INCREASE in size, while EXTENDING implies a more sudden change. Similarly, ENLARGEMENT implies a larger change than EXTENSION. ELONGATION is a more general term that can refer to any kind of lengthening.