Glas

Gwyrdd a Melyn

Coch

Reversible

Incredible

Possible

Horrible

Terrible

Responsible

Legible

Forcible

Sensible

Visible

Afterwards

Immediately

Earlier

Eventually

Previously

Finally

Recently

Yesterday

Tomorrow

Whilst

Poisonous

Dangerous

Mountainous

Marvellous

Perilous

Tremendous

Enormous

Jealous

Precious

Disastrous