heartsease vs quietness

heartsease and quietness both are nouns.

Word	Noun	Adjective	Verb	Adverb
heartsease	Yes	No	No	No
quietness	Yes	No	No	No

As nouns, quietness is a hypernym of heartsease; that is, quietness is a word with a broader meaning than heartsease:

Other hypernyms of heartsease include quietude, tranquility, tranquillity.

heartsease (noun)	quietness (noun)
the absence of mental stress or anxiety	the property of making no sound
common Old World viola with creamy often violet-tinged flowers	a state of peace and quiet
violet of Pacific coast of North America having white petals tinged with yellow and deep violet
a common and long cultivated European herb from which most common garden pansies are derived