hyperplasia:

an increase in the size of an organ due to an increase in the numbers of cells. The developing embryo increases in size due to cell division. The cells of some tissues retain the ability to divide throughout life, like the epithelium and connective tissues but muscle and nerve cells lose their ability to divide soon after birth. When hyperplasia is uncontrolled it produces a tumour which may be benign if it is well contained, not destructive and does not spread. But it may be malignant, destroys normal tissue, and spread all over the body.

Precancerous condition in which there is an increase in the number of normal cells lining an organ. 

abnormal increase in the size/volume of a tissue due to multiplication of cells 

an increase in the number of abnormal cells lining the uterus (a precancerous condition).