excavation vs gallery

excavation and gallery both are nouns.

Word	Noun	Adjective	Verb	Adverb
excavation	Yes	No	No	No
gallery	Yes	No	No	No

excavation (noun)	gallery (noun)
the act of extracting ores or coal etc from the earth	narrow recessed balcony area along an upper floor on the interior of a building; usually marked by a colonnade
the act of digging	a covered corridor (especially one extending along the wall of a building and supported with arches or columns)
a hole in the ground made by excavating	a long usually narrow room used for some specific purpose
the site of an archeological exploration	a room or series of rooms where works of art are exhibited
	a porch along the outside of a building (sometimes partly enclosed)
	a horizontal (or nearly horizontal) passageway in a mine
	spectators at a golf or tennis match