colouring vs dyeing

colouring and dyeing both are nouns.

Word	Noun	Adjective	Verb	Adverb
colouring	Yes	No	No	No
dyeing	Yes	No	No	No

As nouns, dyeing is a hyponym of colouring; that is, dyeing is a word with a more specific, narrower meaning than colouring:

Other hyponyms of colouring include tinting, hair coloring.

colouring (noun)	dyeing (noun)
the act or process of changing the color of something	the use of dye to change the color of something permanently
a visual attribute of things that results from the light they emit or transmit or reflect
a digestible substance used to give color to food