An opinion or conclusion based on guesswork:
A conjecture arrived at by guessing.
Speculation is the act of formulating an opinion or theory without fully researching or investigating.
The definition of a supposition is an assumption.
A judgment or estimation of the merit of a person or thing:
An attempt to reach a target with a rocket:
Find another word for guesswork. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for guesswork, like: conjecture, guess, speculation, supposition, surmise, opinion, guessing, shot and dead-reckoning.