This idea of thinking of groups of words as one unit is nothing new, but it might help you think of different word categories (e.g., idioms, phrasal verbs, fixed phrases, binomials, among others) as having more things in common as you might have initially thought. They're Polywords.

I've prepared some activities that can help you understand polywords better:

1. Matching task
2. Reading and Use of English part 1 (C1/C2)
3. Reading and Use of English part 2 (C1/C2)

Answers can be found here.

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