-able, -ible

usable, incredible

able to

-er, -or

competitor

one who does

-fy

dignify, justify

to make

-ism

rationalism, catholicism

the practice of

-ist

feminist, environmentalist

One who is occupied with

-less

meaningless

without, lacking

-logue, -log

prologue, dialog

a particular kind of speaking or writing

-ness

aggressiveness

the quality of

-ship

sportsmanship

the art or skill of

-tude

attitude, rectitude

the state of