The rate of increase in households is higher for apartment houses than for individual houses.

My brother, being yet unmarried, did not keep house, but boarded himself and his apprentices in another family.

Four families were killed in the fire.

Seven families were burned out by the fire.

The house could accommodate two families.

A household is a group that shares the same living space and finances.

It must be terribly difficult, running her household on her own after divorcing.