As nouns the difference between positivity and hopefulness
is that positivity is (uncountable) the condition of being positive (in all senses); positivism while hopefulness is the property of being hopeful.
positivity
English
Noun
(uncountable) The condition of being positive (in all senses); positivism
(countable) The result of being positive.
Synonyms
* positiveness
Antonyms
* negativity
hopefulness
English
Noun
(-)
The property of being hopeful.
Antonyms
* hopelessness