This entry is about differences in vocabulary of formal and informal styles. For general differences, see this article.
Both formal and informal vocabulary can be found in all spheres of the language. As the language becomes more liberal, combining these two groups of words gets more common. Below is an example list of words and expressions in formal and informal registers.
What does ‘formal’ mean? Simply put, it means something or someone following established norms, traditions and habits. A formal letter should have certain structure and vocabulary, usually more official and strict. Think of formal as a rough synonym for ‘official’.
Vocabulary for letters
|To ask for help||To request assistance|
|To tell, to let know||To inform, to notify|
|Speak to||Address smb.|
|Talk about||Discuss, consider|
|Fix, take care of, put right||Rectify, amend|
|I think that …||I believe/hold it that …|
|I want to …||I wish to …|
|I’m ready to …||I am willing to …|
|I’m angry about …||I am dissatisfied with …|
|Deal with, take care of||Manage, resolve, settle|
|Put up with||Tolerate, bear, endure|
|Thanks||I am grateful/thankful for …|
|I’m sorry about …||I regret about …|
|I’m writing about||I am writing regarding|
|I’ll get in touch …||I will contact …|
|If you have any questions||Should you have any questions|
General formal and informal vocabulary
|And||As well as …|
|So, in this manner||Thus|
|If …||Should … /Whether …|
|If … or not||Whether … or not|
It is recommended to stick to either formal or informal words whenever possible. In other words, don’t mix two registers. It is as important as consistency in using English and American spelling. However, using two registers in your speech is not a serious error. At least as far as your speech is concerned. You should nevertheless pay attention to your writing — if you can use a less colloquial expression in your formal letter then you should do so. Sometimes mixing can’t be helped — for example, using phrasal verbs in a text. Phrasal verbs give life to your writing, so you shouldn’t abstain from using them. But such things as contracted forms or slang words — they do not belong in a formal text. Some dictionaries have detailed entries on formal and informal register.
Use your judgement and common sense to decide on the register. For example, a letter to your boss who is much older than you, but whom you know very well is likely to be semi-formal, despite of his age and position. Conversely, if you are the head of department writing to a junior staff member whom you do not know, your letter should be on the formal side.
Bottom line is: if you are unsure whether to use formal or informal words, then stick to more respectable and tactful formal vocabulary. Nobody is going to hate you for being too formal. You will get a funny look or two if you overshoot with formality, but that is definitely not the end of the world!
On the other hand, opting for informal style and vocabulary in certain situations may be tactless and even rude. This in mind, use this simple rule:
When in doubt, keep it formal!