Example : They spoke simultaneously.

Synonyms : simultaneously

Example : Concurrently with the conference an exhibition of things associated with Rutherford was held.
Going to school and holding a job at the same time.

Synonyms : concurrently

Example : Although I'm a little afraid, however I'd like to try it.
While we disliked each other, nevertheless we agreed.
He was a stern yet fair master.
Granted that it is dangerous, all the same I still want to go.

Synonyms : all the same, even so, however, nevertheless, nonetheless, notwithstanding, still, withal, yet