Unscramble Oopref

What is the meaning of word oopref unscrambled?

What 6 letter words can be made from letters O O P R E F:

Make more words by adding or removing letters

How many 5 letter words can you make from letters O O P R E F?

1. proof - Definition of proof

Which 5 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter O and unscrambling opref
2) Removing the letter O and unscrambling opref
3) Removing the letter P and unscrambling ooref
4) Removing the letter R and unscrambling oopef
5) Removing the letter E and unscrambling ooprf
6) Removing the letter F and unscrambling oopre

More anagrams containing the letters O O P R E F
ooprfe oorefp reoofp oprefo