Unscramble Gsub

What is the meaning of word gsub unscrambled?

What 4 letter words can be made from letters G S U B:

1. bugs - Definition of bugs

Make more words by adding or removing letters

How many 3 letter words can you make from letters G S U B?

1. bug - Definition of bug

2. bus - Definition of bus

3. sub - Definition of sub

4. USB - Definition of USB

Which 3 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter G and unscrambling sub
2) Removing the letter S and unscrambling gub
3) Removing the letter U and unscrambling gsb
4) Removing the letter B and unscrambling gsu

More anagrams containing the letters G S U B
gubs gusb bugs gbsu