Just The Word collocations - helps users in writing English...
A collocation thesaurus concordancer that produces word clouds!
On the surface of it Just-the-Word looks just like any other online dictionary or thesaurus, but start using it and you will soon find that it's much more.
By the way Collocation is an arrangement or juxtaposition of words or other elements, especially those that commonly co-occur, i.e. rancid butter, bosom buddy, or dead serious and a concordancer is a computer program that automatically constructs a concordance.
Of course a concordance is an alphabetical list of the principal words used in a book or body of work, with their immediate contexts.
Ideal for Language, ESOL, EFL, ESL, etc. practitioners.
And there is more - click on a small button that says 'View in Wordle' and Just-the-Word will link through automatically to Wordle and create a word cloud of the most frequent collocations.
As a Physics and Maths Practitioner, this is all a bit beyond me but I'm assured it is an excellent tool.