Here you will find the letter for Thesaurus.com.
I do not see an actual e-mail address as to where we can e-mail dictionary.com or thesaurus.com. The only way I see to contact them is through the website. It is the same website and method of contact for both dictionary.com and thesaurus.com, I am going to send to separate letters to them though, I hope you will too. The have previously posted the letter for dictionary.com, this is the letter for thesaurus.com.
This is the website you want to visit:
Then choose the drop down menu underneath the heading "general website". Choose "information removal request" and then continue. Then you can enter the info and go.