these are all names of "houses" for people and animals.
completely baffled by the first one and would appreciate some help.
1 Not XX, YX or XY but the other combination (5 letters)
2 Temporary military encampment under canvas on a journey (7 letters)
3 ISS, for instance (5, 7 letters)
4 Conishead, Dunstable or rehabilitation (6 letters)