flats, not apartments
wardrobes, not closets
hall, not front entry
loo or toilet, never bathroom - that's where the bath is!
spare room, not guest room
as for a 'terrace', definitely a row of houses - I live in one (of the Georgian variety)!
yard - coming from a rural background, this is where all the farm machinery, cars etc are kept. The garden is what is around the house.
Can't think of any others at the moment, though I'm sure more will come to me at a later stage!