Unscramble Opnum

What is the meaning of word opnum unscrambled?

What 5 letter words can be made from letters O P N U M:

Make more words by adding or removing letters

How many 4 letter words can you make from letters O P N U M?

1. muon - Definition of muon

2. upon - Definition of upon

Which 4 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter O and unscrambling pnum
2) Removing the letter P and unscrambling onum
3) Removing the letter N and unscrambling opum
4) Removing the letter U and unscrambling opnm
5) Removing the letter M and unscrambling opnu

More anagrams containing the letters O P N U M
opumn opunm unomp upnmo