door vs doorsill

door and doorsill both are nouns.

Word	Noun	Adjective	Verb	Adverb
door	Yes	No	No	No
doorsill	Yes	No	No	No

door (noun)	doorsill (noun)
a swinging or sliding barrier that will close the entrance to a room or building or vehicle	the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway
the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
a room that is entered via a door
a structure where people live or work (usually ordered along a street or road)
anything providing a means of access (or escape)