Buildingblock

4 clues
Lego unit
Lego bit, e.g.
... for an architect?
Association of constructors?
Similar answers:
Aframebuildings
Bawdybuilding
Boatbuilding
Bodybuilding
Brigbuilding
Building
Buildinga
Buildingacase
Buildingblock
Buildingblocks
Buildingbox
Buildingbridges
Buildingpermit
Buildingperms
Buildingprotractor
Buildingshiites
Buildingsnowmen
Buildingspecs
Buildingsuper
Buildingsupport