i have bad data for instance, the use of capital letters in the middle of the word.
I identified the errors, made a list and put it in a file error_correction.txt
Incorrect,Correct
VeNOM,Venom
nos,NOS
.
.
.



My data file looks like this:
vgr,bugatti veron,,3.5,Venom,6,.......,....
vgr,lamborgini,,3.5,nos,6,.......,....
abc,bugatti veron,,3.5,Venom,6,.......,.......
.
.
.
.

I need to replace the terms in a the 5th field with that from the file.
How do i do this using awk??