comfortableness

nouns

a state of being relaxed and feeling no pain

"he is a man who enjoys his comfort"; "she longed for the comfortableness of her armchair"

comfort, comfortableness

is derived from

a feeling of being at ease in a relationship

comfortableness

is derived from

is a type of (narrower)

happiness felt in a secure relationship

"with his classmates he felt a sense of belonging"