The plural of princess is princesses - just add "es." It's the same for prince: the plural is princes.
daddies.
Clouds
That is the correct spelling "princesses" for more than one princess.
Trophies
that is 'antennae' .
Yes you can have more than 1 prince in a family.
Latches.
slides
daddies.
Clouds
circus's
axes
That is the correct spelling "princesses" for more than one princess.
spell it out - there is more than one ADEA
Trophies
I think perhaps you are trying to spell countries, as in more than one country.
One activist. Several activists.