I'd have to sell my commission, I reflected as I walked along the rainsoaked pavement of Berkeley Square.

A word is a plesionym if it is a near-synonym, but substitution of the word does not leave the same truth conditions. For example, it 'It wasn't misty, just foggy', the words 'misty' and 'foggy' are pleisonyms of each other. […] Plesionyms are often used to indicate that the speaker is grappling after precision, but perhaps does not possess the precise vocabulary or technical term for the object in mind.

to run through a book

And, my friend believes, Armedov is getting paid by...? Yes, our friends at Langley! CIA handwriting all over it, he reckons!