While physical editions were published by (formerly Longman), digital versions have become a popular alternative for modern students:
While many users search for "PDF" versions, it is often more practical to use official digital and physical alternatives: Longman Dictionary of Contemporary English | LDOCE longman wordwise dictionary pdf upd
Unfortunately, I couldn't find a direct link to a free PDF update of the Longman Wordwise Dictionary. However, I can suggest some alternatives: longman wordwise dictionary pdf upd
It explicitly addresses differences between words with similar or confusing meanings, helping learners avoid common pitfalls Google Books Engagement Tools: Older editions often included a Memory Coach CD-ROM longman wordwise dictionary pdf upd