Speculate, guess, conjecture, surmise
What is the difference between above words?what are the words which are exchangable?

Thankyou

Question

Speculate, guess, conjecture, surmise
What is the difference between above words?what are the words which are exchangable?

Thankyou

Answer

This four words are basically the same meanings, and they all are exchangable with each other. 
The best place to find the meanings of these words are to go to this website for your research: http://webstersdictionary1828.com/
Hope this helps you!