Unscramble Tfsr

What is the meaning of word tfsr unscrambled?

What 4 letter words can be made from letters T F S R:

Make more words by adding or removing letters

How many 3 letter words can you make from letters T F S R?

1. FRS - Definition of FRS

2. TRF - Definition of TRF

Which 3 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter T and unscrambling fsr
2) Removing the letter F and unscrambling tsr
3) Removing the letter S and unscrambling tfr
4) Removing the letter R and unscrambling tfs

More anagrams containing the letters T F S R
trfs trsf trsf tfrs