Noun and の adjective
こくるい
私は穀類を毎食摂るようにしています。
I try to have grains with every meal.
Grains are types of grains! You thought they would be something else? Nope. Grains are pretty boring.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.