Vocabulary of a language as a System

The English language is an organized system.
We call vocabulary systematic because the sum total of all words in it may be considered as a structural set of interdependent and interrelated elements.

https://present5.com/lecture-4-semantic-classification-of-the-english-lexicon/

https://en.ppt-online.org/157156

https://slide-share.ru/vocabulary-of-a-language-as-a-system-169819

https://en.ppt-online.org/155643

According to the principles of classifying linguistic units the following semantic classes can be singled out:
Synonyms
Lexical and terminological sets
Lexico-semantic groups
Semantic fields
Antonyms

https://en.ppt-online.org/157156

https://present5.com/the-morphological-classification-of-words-1-one/

Another type of lexical grouping is known as word-families.

https://en.ppt-online.org/91554

https://en.ppt-online.org/91554

The simplest? Most obvious non-semantic grouping is the alphabetical organization of written words, as represented in most dictionaries.

https://www.slideserve.com/dane/english-lexicography-powerpoint-ppt-presentation

https://thepresentation.ru/angliyskiy-yazyk/lexicography-types-of-dictionaries-1

https://slide-share.ru/introduction-to-english-lexicography-93647

https://thepresentation.ru/angliyskiy-yazyk/lecture-8-fundamentals-of-english-lexicography

https://en.ppt-online.org/319691

A thesaurus is a book which lists words alphabetically in a similar way to a dictionary. Beside each word entry is a list of synonyms.
https://www.slideshare.net/taylorrogers15/using-a-thesaurusppt

https://en.ppt-online.org/563919

https://thepresentation.ru/angliyskiy-yazyk/lecture-8-fundamentals-of-english-lexicography