A mighty natural force which is beyond human control, notably if potentially catastrophic, such as the elements (e.g. storms and extreme temperatures) or geological (e.g. seismic and volcanic) activity.

plural of forced laborer

A convict sentenced to perform forced labor

plural of task force

The weak nuclear force.

plural of spent force

A rhyme that is produced by changing the normal spelling of a word, or by changing the normal structure of a phrase.

plural of forced rhyme

(of a law, regulation, etc.) To become valid or active, to inure.

plural of parallelogram of forces