1) Although, to a Brit 2) As long as, old-style 3) At the same time as, to Brits 4) During the time that 5) During, British style 6) Even though to Brits 7) For the moment 8) In the time that Found on https://www.crosswordclues.com/clue/whilst
Whilst adverb [ From Whiles ; confer Amongst .] While. [ Archaic] « Whilst the emperor lay at Antioch.» Gibbon. The whilst , in the meantime; while. [ Archaic.] Shak. Found on http://www.encyclo.co.uk/webster/W/30