Compiling a dictionary of a very many words that are not in the dictionary - mine is a dictionary of sexual slang - I naturally reflected on the words that do ordinarily get published. Most people say the average lexicons include too many useless "dictionary words" and by that they mean that you never hear or even read such words, that the words are only for lexicographers (and take up space in the lexicon that could better be used by words that are censored or squeezed out now although they are found in everyday use).
Ashley, Leonard R. N.
Word Ways: Vol. 36
, Article 23.
Available at: http://digitalcommons.butler.edu/wordways/vol36/iss3/23