appear, be, feel, lie, look, seem
The box lay empty on the bed.

become
remain, stand, stay
The city is letting useful housing stand empty.

leave sth
The house had been left empty for several weeks.

completely, entirely, quite, totally, utterly
There was a vast expanse of totally empty sky to look at.

almost, nearly, practically, virtually
largely, mostly
half
a half-empty box of chocolates

fairly, quite, rather, relatively
Some parts of the city are desperately overcrowded while others are relatively empty.

very
We all feel very empty now she's gone.

apparently, seemingly
eerily, strangely, surprisingly
The house felt strangely empty without the children.

otherwise
There were a few chairs, but the room was otherwise empty.

of
The streets were empty of people.

Empty is used with these nouns:
alley, apartment, auditorium, bag, beach, bed, belly, bench, berth, boast, bottle, bowl, box, bucket, building, calorie, can, carriage, chair, clip, container, corner, corridor, cubicle, cup, cupboard, desert, desk, dish, exercise, existence, expanse, feeling, flat, fridge, gesture, glass, hall, hallway, highway, house, land, larder, lot, mug, packet, page, pail, pavement, phrase, plate, pool, promise, refrigerator, rhetoric, ritual, road, room, seat, shelf, shell, shop, sidewalk, sky, slogan, socket, space, stage, stall, stomach, street, stretch, suitcase, table, talk, tank, threat, throne, train, tummy, vessel, void, wallet, word, wrapper