Oral = (1) using speech rather than writing: Always go for a written agreement in business than relying on an oral agreement.In the oral examination, she was asked to recite the name of all presidents. (2) of or relating to mouth: He has undergone an oral surgery.She practices good oral hygiene by brushing her teeth at least twice a day.

Both the words Spoken and Oral can be used to refer to language skills and the communication of information. However, oral is slightly more technical than spoken. The use of oral to mean spoken is restricted to certain technical phrases used in education: Oral skills, An oral examination.


Use opposite and the opposite of only when you mean that two things are altogether different in nature, quality, or significance: thought that the medicine would make him sleepy, but it had the opposite effect.The opposite of long is short.The two men went off in opposite directions. (= one went to the left and one to the right)

To describe people opinions, life styles, ways of thinking etc., the usual word is different: These two schools of thought are completely different.

One thing is opposite another thing (WITHOUT to/of): The nearest bus stop is opposite the bank.

When opposite means facing the speaker or the person/place being talked about,it comes immediately after the noun: The house opposite is also for sale.


Operate = (1) direct or control something: Do you know how to operate this machinery? (2) perform surgery on (medicine): Have you heard what happened to the last patient he operated on? (3) to perform a function or work: The motor operates smoothly.The camera also operates underwater. (4) to be involved in military activities: A militant group  is operating against the government.

Operation = (1) the state of being in  effect or being operative: That law is no longer in operation. (2) a planned activity involving many people performing various actions: They planned a rescue operation. (3) a medical  procedure involving an incision with instruments: My mother is having an operation tomorrow. Mr. Barrett is going to have an operation on his back.


Once = (1) one time only: You have to take this medicine once a day. (2) whenever; as soon as: Once it stops raining, we can go out. (3) at some indefinite time in the past: She was a very popular actress once. (4) used in negative sentences and questions, and after if to mean ever or at all: He didn’t once thank me.If she once decides to do something, it becomes difficult to change her mind.


Often = (1) many times; frequently or in great quantities: The trains are often late.They often go out to dinner. (2) in many cases or instances: People are often afraid of things they don’t understand.

Every so often = sometimes; occasionally: I meet him at the club every so often.Every so often I heard a strange noise outside.

As often as not = quite frequently; usually; in a way that is typical of somebody/something: As often as not, he’s late for work.


Offence= (1) a feeling of anger caused by being offended: ‘He took offence at my slightest criticism.’ (2) the team that has the ball (or puck) and is trying to score: ‘Our team has the best offence in the league.’ Commit an offence (NOT do): ‘He is accused of committing various minor offences.’


O’clock is a contraction of “of the clock” or “on the clock” that means “according to the clock”: ‘We are expected to be there at seven o’ clock in the morning.’

Do not use o’clock for times that include minutes or parts of an hour. Compare: ‘It’s four o’clock.’ ‘It’s ten past four.’

Use EITHER o’clock OR a.m./p.m. in a sentence (NOT both). Compare: ‘The work should be completed by seven o’clock.’ ‘The work should be completed by seven p.m.’

Do not use o’clock after 6.00, 7.00 etc. Compare: ‘8 a.m.’, ‘8.00’, ‘8.00 a.m.’, ‘8 o’clock’.


Occupation= (1) a person’s occupation, work, or trade: ‘She is thinking to change his occupation and become a writer.’ (2) the state of being held or possessed: ‘The office is ready for occupation.’ ‘Occupation of a building without a certificate of occupancy is illegal.’

Job = a specific piece of work required to be done as a duty or for a specific fee: ‘It used to be difficult for women to get good jobs.’ ‘The important thing is to be happy in your job.’

Occupation and Job have similar meaning but occupation is mainly used in formal and official styles.


Object = (1) a tangible and visible entity; an entity that can cast a shadow: ‘This box was full of rackets, balls, and other objects.’ (2) the purpose intended to be attained (and which is believed to be attainable): ‘The object of the game is to score as many points as possible.’ ‘Nobody knows the real object of their visit.’ (3) (grammar) a constituent that is acted upon: ‘The object of the verb’ (4) express or raise an objection or protest or criticism or express dissent: ‘She never objects to do any work she is assigned with.’

Objective = the goal intended to be attained by the end of a course of action: ‘The company’s long-term objective is to increase sales overseas.’ ‘The course description began with a long list of aims and objectives.’


Now = (1) at the present time or moment: ‘Everything is fine now.’ (2) without delay or hesitation; immediately: ‘Come here now.’ (3) in these times: ‘We now rarely see horse-drawn vehicles on city streets.’ (4) very recently; in the immediate past: ‘He left the office just now.’ (5) used to introduce a command, reproof or request: ‘Now hear this!’ (6) indicates a change of subject or activity: ‘Now the next task is the execution of the proposed plan.’

From now on (WITH on): ‘From now on I’m going to work really hard and make sure I pass.’

Nowadays (WITHOUT in): ‘More women have executive jobs nowadays, especially in publishing.’ ‘Nowadays, computer skills are essential.’

Nowadays is an adverb (NOT an adjective): ‘Video cameras are very popular nowadays.’