A ‣ Verb + noun suffix 
Suffixes are used at the ends of words; they often tell you if a word is a noun, a verb, an adjective or an adverb. Two suffixes which form nouns from verbs are -ion and -ment.
verb | noun |
invent [produce or design something completely new] | invention |
discuss [talk about something seriously] | discussion |
translate [change from one language to another] | translation |
relax [rest, and feel calm and comfortable] | relaxation |
improve [get better] | improvement |
govern [control the affairs of a city or country] | government |
manage [direct or control a business] | management |
develop [grow or change and become more advanced] | development |
His latest invention is a new board game.
The management has to change.
Relaxation will help you to sleep better.
I need money for more development.
We had a discussion about politics.
We need an improvement in the weather.
B ‣ Adjective + noun suffix 
The suffixes -ness and -ity often form nouns from adjectives.
adjective | noun |
weak (opp strong) | weakness |
happy | happiness |
ill [sick, not well] | illness |
fit [in good condition, usually because of exercise] | fitness |
stupid (opp intelligent, clever) | stupidity |
popular [liked by a lot of people] | popularity |
similar [almost the same; opp different] | similarity |
able | ability (opp inability) |
What is his main weakness as a manager?
Fortunately it wasn’t a serious illness.
Snowboarding is growing in popularity.
There is a similarity between them.
I’m frustrated by my inability to use computers.
Her happiness is all that matters to me.
C ‣ -er,-or and -ist 
These suffixes can be added to nouns or verbs. They often describe people and jobs.
-er | -or | -ist |
ballet dancer | company director | artist, e.g. Picasso |
pop singer | translator | economist |
professional footballer | film actor | scientist |
Language help
Adding a suffix to a verb, adjective or noun may change the position of the main stress, e.g. re'lax – relax'ation, 'stupid – stu'pidity, eco'nomics – e'conomist.
(The ' symbol is before the syllable with the main stress.)