Dictionaries of synonyms and their comparison

Synonyms - different words with similar or identical meanings and they are interchangeable.
Dictionaries of synonyms present us a list of words in an alphabetical order with synonyms which are known at the present time.

‘Webster’s New English Dictionary of Synonyms’

‘Webster’s New English Dictionary of Synonyms’
The 1st edition was printed in the 1940s;
The 2nd edition was printed by MERRIAM-WEBSTER INC., Publishers SPRINGFIELD, MASSACHUSETTS, U.S.A. in 1984.
Editor-in-Chief: Philip B. Gove.

‘Synonyms, in this dictionary, will always mean one of two or more words in the English language which have the same or very nearly the same essential meaning.’
Analogous words are closely related in meaning merit the name of "near synonyms,“ so close are they to the vocabulary entry.
Contrasted words are words that are strongly contrastable but not quite antonymous with the entry word

‘The Oxford Dictionary of Synonyms and Antonyms’
Was complied by Alan Spooner,
Oxford University Press 1999;
Has 2 editions;
The 2nd edition was created in 2007