I'm just guessin' here, but I think she's gonna be late.

The team's guessworks were proven wrong.

He guesseth the answer correctly.

She guessest the answer correctly.

She spoke guessably, leaving no room for doubt.

The guesstimators were asked to estimate the number of attendees at the event.

The guesstimator made an estimate based on limited information.

Guessworkers are often underpaid and undervalued.

The guessworker relied on intuition rather than facts to make decisions.