cold cereal vs granola

cold cereal and granola both are nouns.

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

As nouns, granola is a hyponym of cold cereal; that is, granola is a word with a more specific, narrower meaning than cold cereal:

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

Other hyponyms of cold cereal include raisin bran, corn flake, bran flake, wheatflake, puffed rice, puffed wheat.

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