maize vs yellowness

maize and yellowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
maize	Yes	No	No	No
yellowness	Yes	No	No	No

As nouns, yellowness is a hypernym of maize; that is, yellowness is a word with a broader meaning than maize:

maize: a strong yellow color
yellowness: yellow color or pigment; the chromatic color resembling the hue of sunflowers or ripe lemons

Other hypernyms of maize include yellow.

maize (noun)	yellowness (noun)
a strong yellow color	yellow color or pigment; the chromatic color resembling the hue of sunflowers or ripe lemons
tall annual cereal grass bearing kernels on large ears: widely cultivated in America in many varieties; the principal cereal in Mexico and Central and South America since pre-Columbian times