Answer:

whilst

Answer	Crossword Clue
WHILST	During the time that
WHILST	".. I alone did call upon thy aid": Sonnet 79
WHILST	For the moment

WHILST	As long as
WHILST	During, quaintly
WHILST	During, in Devon
WHILST	Although, to a Brit
WHILST	Conjunction.
WHILST	In the meantime.
WHILST	During, of old.
WHILST	During, British style

WHILST	At the same time
WHILST	In the time that
WHILST	As long as, old-style
WHILST	During which
WHILST	Even though: Poe
WHILST	At the same time as, to Brits