Change, add or subtract (up to two letters) - 11

Sincerity

Insincere

Recession

Procession

Yes it can fit Bellanonna but is has two letter changes and an extra letter.
After a lifetimes experience I have learned that a woman is never wrong so I will carry on regardless.
Profession

Spoonerisms

Sublime

BTW Can you see that in the above I substituted your
F for an M then added S??

Responsive (following Spoonerisms)

Princesses

Impresses

Primroses

Poisoners

Aspersions

Supersonic

Passerines

Oh, too late
Supersonic

Precocious

Croupiers

Oops late again Bellanonna Its like a bus .....we wait ages for one then there`s a rush!!!(Supersonic)

Preciously

Corpuscles

It’s a bit like thst Panache. Btw lovely to see you!

Scruples

Jangran99 I had to google Spoonerisms but when I saw it I thought you were agreeing with my entry this morning that you couldn’t make Forwarded from Reworded if you stay with the rules.
I never dreamed that Spoonerisms fitted the criteria. I bow to your superior knowledge.

Pleasure