Collocation Dictionary
Common collocations with optional in American Collocation
optional
adjective
What are red words?
Around 90% of spoken and written English relies on just 7,500 common words.
These words are highlighted in red and are ranked using a star system.
- One-star words are commonly used
- Two-star words are even more common
- Three-star words are the most frequently used
What are red words?
Around 90% of spoken and written English relies on just 7,500 common words.These words are highlighted in red and are ranked using a star system.
- One-star words are commonly used
- Two-star words are even more common
- Three-star words are the most frequently used
US
/ˈɑpʃən(ə)l/
completely
entirely
purely
strictly
The project is entirely optional and students may form any group of people to undertake the research.
additional feature
accessory
add-on
extra
You can also purchase optional accessories including a travel charger and a wireless keyboard.
part of course of study
dissertation
module
subject
unit
Optional modules include: advanced research methods; medical law and ethics; Freud and Psychoanalysis.
trip
excursion
tour
We can organise your choice of accommodation, optional tours and transfers.