Reverend Thomas Dyche (died c. 1733) was an English schoolmaster and lexicographer (probably) from Ashbourne, Derbyshire.

In 1716, Dyche's book A Guide to the English Tongue was being published by the linguist Bartholomaeus Ziegenbalg in Tharangambadi.

Thereupon Ward sued Dyche for libel, and at the trial, 18 June 1719, was awarded sizeable damages.

[4] Sorting words by sound and then in order led to lists that attracted comment, e.g., hiss, kiss, miss, piss, bliss.

Although this work was called A Dictionary of Words us'd in the English Tongue... it was a guide to spelling and pronunciation.