UnScramble this Word: r e l r c e a?

Questions

What word describes the phase of the moon between half and full?

Who became World Motor Racing Champion in 1976?

When Wilde wrote "The unspeakable in full pursuit of the uneatable", what was the uneatable?

What was the name of the North Sea oil rig that overturned in 1980?

What name is given to the spore-bearing leaf of a fern?