You have spelled the word correctly: cooperate. It used to have a hyphen co-operate but that is now not used.
Yes, "cooperate" can also be spelled as "co-operate" in British English. Both spellings are correct and commonly used.
The correct spelling is "provinces."
The plural form of "scarf" is spelled "scarves."
The plural form of stimulus is stimuli.
The likely word sought is "seconds" (more than one second, or additional servings).
The correct spelling is "listen" (pay attention to a sound).
Latches.
slides
Clouds
daddies.
axes
circus's
Trophies
spell it out - there is more than one ADEA
I think perhaps you are trying to spell countries, as in more than one country.
One activist. Several activists.
Bills
yes charels