yoghourt vs food

yoghourt and food both are nouns.

Word	Noun	Adjective	Verb	Adverb
yoghourt	Yes	No	No	No
food	Yes	No	No	No

As nouns, food is a hypernym of yoghourt; that is, food is a word with a broader meaning than yoghourt:

yoghourt: a custard-like food made from curdled milk
food: any solid substance (as opposed to liquid) that is used as a source of nourishment

Other hypernyms of yoghourt include solid food, dairy product.

yoghourt (noun)	food (noun)
a custard-like food made from curdled milk	any substance that can be metabolized by an animal to give energy and build tissue
	anything that provides mental stimulus for thinking
	any solid substance (as opposed to liquid) that is used as a source of nourishment