Shell Programming and Scripting

Hello,
I have data which is basically a set of rows in which names having the same homophonic values are stored. I want to convert the data into lines such that the first word of the database is treated as the anchor and each subsequent word is appended to it with a column.
An example will make this clear:
The existing data is:
Expected output
I have truncated the data, since in a few cases the row can have up to thirty to forty homophones.
Any help would be gratefully acknowledged. At present I am using a macro which is pretty slow and since the number of such data is very large, it is very time-consuming
Many thanks

Code:

awk -F"=" '{for (i=2;i<=NF;i++) {printf $1"=";print $i}}' file

Code:

$ awk -F\= '{for(i=2;i<=NF;i++){print $1 FS $i}}' input.txt
aladeen=aladeena
aladeen=aladin
aladeen=aladina
aladeen=alaudadeen
aladeen=alaudadeena
aladeen=alauddeen
aladeen=alauddeena
aladeen=alauddin

Code:

 awk -F= '{x=$1;$1=z;gsub(OFS,RS x FS)}1' yourfile

Many thanks to all for the prompt reply. If there was a delay, it is because I tested all the solutions and they all worked like magic, with the same speed.

I found they work better if gawk32 is used instead of awk or gawk.

Many thanks once again to the community and all its wonderful helpers who reply instantly and provide elegant solutions that work.

Interesting approach, took me a while to understand