Here are the possible solutions for our boarding house oath clue
Answer
Clue
Relevancy
egad
Clue
"Our Boarding House" oath
Definition
(archaic) a mild oath, also ECOD, EGADS, IGAD
daygirls
Clue
Non-boarding pupils at a boarding school
Definition
DAYGIRL, a girl who attends a boarding-school daily but returns home in the evening
oslin
Clue
Grammy-winner K.T. whose ode "80's Ladies" claims "We burned our bras / And we burned our dinners / And we burned our candles at both ends" haha sounds like us
eton
Clue
"The King's College of Our Lady of ___ besides Wyndsor" (original name of a British boarding school)