Yes, the word softness is a compound word because it is made up of two words: soft+ness.
The opposite of softness is hardness.
its softness felt good
The softness of the blanket enveloped her in warmth as she curled up on the couch to relax.
Example sentence - The softness of the blanket was calming.
The noun 'softness' is a concrete noun as a word for a physical quality.The noun 'softness' is an abstract noun as a word for the quality of being sympathetic, lenient, or compassionate; the tendency of a market, currency, or commodity to fall in value; a word for a concept.
The softness of the cat's fur is very soothing. The softness here is the soft nature of the fur.
"Blanket of softness beneath your feet."
No, building is not a compound word.
The contraction (not a compound word) is doesn't.
Upwards is a compound word.
There is no compound word.A compound word is a word like bus-stop.Husban is spelt like this husband
Upstairs is a compound word, so it is one word.