groats vs cereal

groats and cereal both are nouns.

Word	Noun	Adjective	Verb	Adverb
groats	Yes	No	No	No
cereal	Yes	Yes	No	No

As nouns, cereal is a hypernym of groats; that is, cereal is a word with a broader meaning than groats:

Other hypernyms of groats include food grain, grain.

groats (noun)	cereal (noun)
the hulled and crushed grain of various cereals	a breakfast food prepared from grain
	foodstuff prepared from the starchy grains of cereal grasses
	grass whose starchy grains are used as food: wheat, rice, rye, oats, maize, buckwheat, millet

groats (adjective)	cereal (adjective)
	made of grain or relating to grain or the plants that produce it