tempera vs water-base paint

tempera and water-base paint both are nouns.

Word	Noun	Adjective	Verb	Adverb
tempera	Yes	No	No	No
water-base paint	Yes	No	No	No

As nouns, water-base paint is a hypernym of tempera; that is, water-base paint is a word with a broader meaning than tempera:

tempera: pigment mixed with water-soluble glutinous materials such as size and egg yolk
water-base paint: paint in which water is used as the vehicle

tempera (noun)	water-base paint (noun)
pigment mixed with water-soluble glutinous materials such as size and egg yolk	paint in which water is used as the vehicle