However, you could use prefixes to create related words with specific meanings:
* Over-estimate: To estimate something at a higher value than it actually is.
* Under-estimate: To estimate something at a lower value than it actually is.
* Pre-estimate: To make an estimate in advance.
* Re-estimate: To estimate something again, perhaps after receiving new information.
You could also use prefixes to create words with a similar meaning to "estimate" but with a slightly different focus, such as:
* Approximation: A close but not exact calculation or guess.
* Prediction: A statement about what will happen in the future, often based on an estimate.
* Projection: An estimate of a future value based on current trends.
Ultimately, the best word to use will depend on the specific context and the meaning you want to convey.