paramour = lover
use = she sought divorce on the ground that her husband had a paramour in another town
ferret = rummage through
use = I was just ferreting around in my drawer for my passport
strive = endeavor
use = strive to live up to the expectations
summon = call for, arraign
use = to summon reinforcements
synchronous = happening at the same time
use = there are many examples of scientists in different parts of the world making synchronous discoveries