He sat frowning over a crossword puzzle.
She is a frugal housewife.
Newton's laws were fruitful for science.
He was frustrated in his ambition.
The eggs were frying in the pan.
Aircraft sometimes fuel while in the air.
Gas and coal are fuels.
When Stephen grew up, he fulfilled his hopes and became a doctor.
He is really fuming this time.
The elevator was not functioning.
The function of bones is to give rigidity.
Fresh air is fundamental to good health.
Funeral customs vary with different religions.
The funeral will be held according to church rites.
This meeting room's as hot as a furnace.
The room was furnished with a desk and hat stand.
He furrowed his brow in thought.
In his fury he tore the letter to pieces.
Lead fuses at a low temperature.
This alloy is formed by the fusion of two types of metal.
There is no need to make such a big fuss over it.
You're making too much fuss about it.