micro-
nano-
The prefix that fits the definition of backward or back is "re-".
The prefix that fits the definition of pseudoscience is "pseudo-", which means false or not genuine.
The prefix that means "backwards" is "retro-".
Para
geo
para
auto
olig
ennea
pseudo
Para is the prefix best fitting the definition of beside.
You could add the prefix mis- to it to make the word misfits.