lightness vs aureole

lightness and aureole both are nouns.

Word	Noun	Adjective	Verb	Adverb
lightness	Yes	No	No	No
aureole	Yes	No	No	No

As nouns, aureole is a hyponym of lightness; that is, aureole is a word with a more specific, narrower meaning than lightness:

lightness: the visual effect of illumination on objects or scenes as created in pictures
aureole: an indication of radiant light drawn around the head of a saint

Other hyponyms of lightness include aura, gloriole, glory, halo, nimbus, sunniness, highlight, highlighting, brightness.

lightness (noun)	aureole (noun)
the trait of being lighthearted and frivolous	an indication of radiant light drawn around the head of a saint
the visual effect of illumination on objects or scenes as created in pictures	the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
the property of being comparatively small in weight
having a light color
the gracefulness of a person or animal that is quick and nimble
a feeling of joy and pride