brittle vs untempered

brittle is a noun but untempered is not a noun.

Word	Noun	Adjective	Verb	Adverb
brittle	Yes	Yes	No	No
untempered	No	Yes	No	No

brittle (noun)	untempered (noun)
caramelized sugar cooled in thin sheets

brittle (adjective)	untempered (adjective)
having little elasticity; hence easily cracked or fractured or snapped	not moderated or controlled
lacking warmth and generosity of spirit	not brought to a proper consistency or hardness
(of metal or glass) not annealed and consequently easily cracked or fractured