How to add additional common names to a blast database

blastn with nt as a database can also return scientific name and common name of the blast hit via

sscinames and scomnames in outfmt.

I can get that also if I make my own blast database if I add

-taxid_map gi_taxid_nucl.dmp

in makeblastdb

But how do I add a common name to a scientific name if the common name is missing, or better yet how do I add additional common names for a scientific name so I get output like the following in my blast matches:

momordica charantia     mellow fruit; bitter squash; karellabitter; bitter melon; bitter gourd; melon

Thanks so much in advance.