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100 Commonly Confused Words

commonly-confused-words-online-courseLearn about commonly confused words

Do you confuse affect or effect?

Or what about complimentary and complementary?

Buy now for just A$19.95

Course content

This online writing course, which is part of Working with Words, covers commonly confused words such as:

  • effect and affect
  • its and it’s
  • deserts and desserts
  • advice and advise
  • principal and principle
  • there, their and they’re

You’ll receive some useful memory jogs. For example, did you know that unwanted advice (spelt with a ‘c’) is a vice?

The course is accompanied by an e-book, Word Guide: Choosing the right words you can keep as a reference when you’ve finished the course.

This course takes 1–2 hours to complete and you have access for one year.


‘I’ve picked up some good memory prompts to remember some of the words which trip me up from time to time.’

‘Very informative and worth doing.’

Buy now 

This course is also available in US English. There are some word differences between Australian and US English. For example, Australian English treats practice as a noun and practise as a verb, and US English uses practice for both the noun and the verb.

If you buy this course and would prefer the US version, email mary@onlinewritingtraining.com.au


Some commonly confused words

The online courses cover commonly confused words in more detail (e.g. parts of speech are identified) and the words are accompanied by quizzes.

advice and advise

adviser or advisor?

affect and effect

all ready and already

although and though

altogether and all together

anymore versus any more

appraise versus apprise

around versus round

assure, ensure and insure

biannual, biennial and bimonthly

but and however

careen versus career

chair, chairman or chairperson

compared with versus compared to

compliment versus complementary

continually versus continuously

coordinate or co-ordinate?

decision making or decision-making?

deprecate versus depreciate

desert and dessert

discreet and discrete

disinterested versus uninterested

disorganised versus unorganised

elicit versus illicit

eminent and imminent

empathetic and empathic

got, but and that – words we love to hate

homed and honed

imply and infer

inauthentic and unauthentic

insidious and invidious

focused or focussed – which is correct?

judgement versus judgment

persons and people

practical and practicable

principal and principle

status – status or statuses?

than and then

there, they’re, their