-able,-ible 

usable, nonusable

able to

(Adj.)

-er,-or

competitor, gamer

one who does

(noun)

-fy

dignify, simplify

to make 

(verb)

-ism

rationalism, schism

the practice of

(noun)

-ist

feminist, novalist

one who is occupied with

(noun)

-less

      meaningless,      

         tireless

without, lacking 

(adj.)

-logue,-log 

dialog, catalog

a particular kind of speaking or writing

(noun)

-ness

aggressiveness, peacefulness

the quality of

(Noun)

-ship

sportsmanship, hardship

the art or skill of

(noun)

-tude 

attitude, magnitude

the state of

(Noun)