ensure /in-shoorˈ/

1. To make sure
2. To make safe
3. To betroth (obsolete)
4. To insure (obsolete)

ensurˈer noun

• oil-rich
• oil rig
• oil rigs
• oils
• oil sand
• oilseed
• oilseed rape
• oilseeds
• oil shale
• oil silk
• oilskin
• oilskins
• oil slick
• oil slicks
• oil someone's palm
• oilstone
• oilstones
• oil string
• oil tanker
• oil tankers
• oil the wheels
• oil-tree
• oil-trees
• oil well
• oil wells