granola vs cold cereal

granola and cold cereal both are nouns.

Word	Noun	Adjective	Verb	Adverb
granola	Yes	No	No	No
cold cereal	Yes	No	No	No

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

granola: cereal made of especially rolled oats with dried fruits and nuts and honey or brown sugar
cold cereal: a cereal that is not heated before serving

Other hypernyms of granola include dry cereal.

granola (noun)	cold cereal (noun)
cereal made of especially rolled oats with dried fruits and nuts and honey or brown sugar	a cereal that is not heated before serving