Which is correct or would you say it differently? Is long the correct adjective?
There is a long staircase/flight of stairs to walk up.
Thank you
"Long" is good. "Flight of stairs" always works. I would only use "staircase" if it really was one and it mattered.
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"Long" is good. "Flight of stairs" always works. I would only use "staircase" if it really was one and it mattered. A long flight of stairs might lead to a clifftop from a beach, but a staircase would not. A long staircase might take you from the ground floor to the next floor in one line with no landing at the mezzanine, and it would be a flight of stairs, too.