Open English Wordnet
Adverbs
(r)concurrently, at the same timeoverlapping in duration“concurrently with the conference an exhibition of things associated with Rutherford was held”, “going to school and holding a job at the same time”
(r)however, nevertheless, withal, still, yet, all the same, even so, nonetheless, notwithstanding, at the same timedespite anything to the contrary (usually preceding a concession)“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”