Signing up to Oxford Dictionaries online is a very useful tool in today’s language multiverse, with its useful indication of UK v. US use, pronunciation and derivation and its instant access to synonyms, antonyms and examples.

However, in the search for that delicately precise, alternative term to enrich your prose I have yet to find a true substitute for leafing through the silken paper of a Roget’s Thesaurus. Unlike a dictionary or a more modern thesaurus it groups by idea, offering up cascades of words and phrases that you just have to follow from pool to pool.