heartsease vs quietude

heartsease and quietude both are nouns.

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

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

Other hypernyms of heartsease include quietness, tranquility, tranquillity.

heartsease (noun)	quietude (noun)
the absence of mental stress or anxiety	a state of peace and quiet
common Old World viola with creamy often violet-tinged flowers
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