Customise Change the way it looks

Change the colours of the different types

type now new colour

Change all to same colour

Clear all highlighted words

SPL highlighter

SPL highlighter & gapfill Find subject-specific collocations in a text

Use this tool to highlight collocations (word combinations) from the SPL (Secondary Phrase Lists). Enter the text in the box below then click 'submit'.

Choose the subject (default is Biology).

Select max number of characters (if processing speed is slow, choose a lower number)


The highlighted text will appear here.

Sorted word list (by level) will appear below.

Collocation list Sorted by type

Gapfill Maker Create a simple exercise

Create a simple gapfill for the above text. You will need the words above to complete it. This works best if there are several collocations in the text; if there are only one or two, the exercise will be too easy!

Gapfill will appear here.


Like the website? Try the books. This extract from Unlock the Academic Wordlist: Sublists 1-3 contains all sublist 1 words, plus exercises, answers and more!



Sheldon Smith

Author: Sheldon Smith    ‖    Last modified: 16 March 2022.

Sheldon Smith is the founder and editor of He has been teaching English for Academic Purposes since 2004. Find out more about him in the about section and connect with him on Twitter, Facebook and LinkedIn.

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