hue vs achromatic

hue is a noun but achromatic is not a noun.

Word	Noun	Adjective	Verb	Adverb
hue	Yes	No	Yes	No
achromatic	No	Yes	No	No

hue (noun)	achromatic (noun)
the quality of a color as determined by its dominant wavelength

hue (adjective)	achromatic (adjective)
	having no hue

hue (verb)	achromatic (verb)
suffuse with color
take on color or become colored