What other ways can tera be spelled?

"Tera" is already the most common spelling. There are no other widely recognized spellings.

However, you might find variations depending on the context:

* Scientific context: The prefix "tera-" is used in the metric system to indicate a factor of 10¹² (one trillion). It's always spelled with a lowercase "t" in scientific contexts.

* Foreign languages: The spelling might differ slightly in other languages. For example, in Spanish, it's "tera."

It's important to note that these variations are specific to particular contexts and are not generally used in everyday English.