General Synonyms:
* Information
* Facts
* Figures
* Statistics
* Evidence
* Material
* Details
* Insights
* Knowledge
More Specific Synonyms:
* Metrics: When referring to quantifiable data.
* Observations: For data collected through observation.
* Readings: For data from sensors or instruments.
* Records: For data stored in a systematic way.
* Inputs: When referring to data used in a process.
* Signals: When referring to data transmitted electronically.
* Content: For data in a digital form.
* Measurements: For data collected through measurement.
The best synonym for "data" will depend on the specific situation.
For example, if you're talking about the information gathered from a survey, "responses" might be a suitable synonym. If you're talking about the numbers in a spreadsheet, "figures" might be a good choice.