Open English Wordnet
Nouns
(n)easiness, relaxationa feeling of refreshing tranquility and an absence of tension or worry“the easiness we feel when sleeping”
(n)ease, easiness, simplicity, simplenessfreedom from difficulty or hardship or effort“he rose through the ranks with apparent ease”, “they put it into containers for ease of transportation”, “the very easiness of the deed held her back”