staircase

/ˈstɛɹˌkeɪs/noun

A set of stairs inside a building, together with its railing and supports.

Example sentences

“A grand marble staircase curved up from the lobby.”
“The old house has a narrow staircase leading up to the attic.”

Refers to the whole structure. For the steps themselves, 'the stairs' is the everyday choice: 'up the stairs', not 'up the staircase'.

Synonyms for staircase

stairway
stairs

Related words

basementThe level of a building that sits below the ground.neighborA person who lives next door to you or nearby (the US spelling of neighbour).atticThe room or space just under the roof of a building, often unfinished and used for storage.mortgageA loan for buying a house or land, where the property itself serves as security until the debt is repaid.balconyA platform attached to the outside of a building, usually reached through an upper-floor door or window.rentMoney paid regularly to a landlord for the use of a home, office, or other property.