gladness vs glad

gladness and glad both are nouns.

Word	Noun	Adjective	Verb	Adverb
gladness	Yes	No	No	No
glad	Yes	Yes	No	No

gladness (noun)	glad (noun)
experiencing joy and pleasure	any of numerous plants of the genus Gladiolus native chiefly to tropical and South Africa having sword-shaped leaves and one-sided spikes of brightly colored funnel-shaped flowers; widely cultivated

gladness (adjective)	glad (adjective)
	showing or causing joy and pleasure; especially made happy
	cheerful and bright
	feeling happy appreciation
	eagerly disposed to act or to be of service