If the variables all begin with a common prefix, you can iterate over all such variable names and use indirect variable expansion on the results:
for var in ${!rss_*}; do # rss_ipt, rss_bhd, etc
command1 arg command2 arg "${!var}" > "/some/directory/${!var}.rss"
done
Otherwise, the best you can do is explicitly define an array of variable names, or hard-code the list of names:
vars=( ipt_rss bhd_rss ... )
for var in "${vars[@]}"; do
or
for var in ipt_rss bhd_rss; do
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