B
Sorry!flour…
mouthful
4-letter change…
The word is still
flour
Forceful
…
…Forceful
platefulfuller…
fault…plateful
gratefulfault…
…grateful
togethertarget…
…together
Tyre…
TerselyTyre…
Tense…
pretenseTense…
Steep…
sixteenSteep…
Site…
SlitherSite…
Ether…
ThirteenEther…
Thirst…