Positiveness vs Surety - What's the difference?

Positiveness is a related term of surety.

is that positiveness is (uncountable) the quality of being positive; positivity while surety is certainty.

(uncountable) The quality of being positive; positivity.

*1929 , (Ernest Hemingway), A Farewell to Arms , Folio Society 2008, p. 48:

*:Nobody knew anything about it although they all spoke with great positiveness and strategical knowledge.

(countable) The result of being positive

* negativeness

(wikipedia surety)

certainty

* Bible, Genesis xv. 13

Know of a surety , that thy seed shall be a stranger in a land that is not theirs.

* Sir Philip Sidney

For the more surety they looked round about.

That which makes sure; that which confirms; ground of confidence or security.

* Milton

[We] our happy state / Hold, as you yours, while our obedience holds; / On other surety none.

(legal) A promise to pay a sum of money in the event that another person fails to fulfill an obligation.

* Shakespeare

There remains unpaid / A hundred thousand more; in surety of the which / One part of Aquitaine is bound to us.

(legal) One who undertakes to pay money or perform other acts in the event that his principal fails therein.

* Bible, Proverbs xi. 15

He that is surety for a stranger shall smart for it.

A substitute; a hostage.

(Cowper)

Evidence; confirmation; warrant.

* Shakespeare

She called the saints to surety , / That she would never put it from her finger, / Unless she gave it to yourself.