Letters that make oil rig
o, g, l, r, i are letters that make 'oil rig'
1 possible definitions for 'oil rig'
Under this definition, oil rig is a noun and has the following properties:
drill rig, drilling rig, oilrig have the same meaning as 'oil rig'
'oil rig' can be a type of rig.
drilling platform, offshore rig are types of 'oil rig'.