Glas

Gwyrdd a Melyn

Coch

Though

Although

Dough

Doughnut

Rough

Enough

Tough

Plough

Bough

Toughen

Achieve

Bargain

Controversy

Disastrous

Foreign

Interfere

Nuisance

Programme

Secretary

Temperature

Musician

Magician

Electrician

Politician

Mathematician

Technician

Optician

Beautician

Physician

Dietician