I just totally cheated on this test: http://test3.thespark.com/iq2

and I scored a 102.

I think that greping the unix dictionary helped on those words that start with f and end in m.

familism
fanaticism
farm
fascism
fathom
favoritism
feminism
feudalism
fiefdom
film
firearm
firm
flam
flatworm
foam
forearm
form
formalism
forum
freedom
from
fulcrum