Rashi on bereshis 24:23 says "לין שם דבר." ie. "lin" is a noun. How does that fit in the context considering that Eliezer was asking for a place to "lodge". Even though lodge can be a noun, in this context it would seem a verb.
He asked: "is there a place for a spend-the-night." Lin is a noun. It means "one night's lodgings."
She replied: "there is a place to lodge." Lun is a verb, "to lodge."