how to write a go test that need massive test case

Let's say I have a list that has about 210000 english words.

• I need to use all these 210000 words as test case.
• I need to make sure every words in that list is covered every time I run my test.

The question is: What is the best practices to store these words in my test?

should I save all these words in a slice (will it be too large a slice? ), or should I save these words in a external file (like words.txt) and load the file line by line when needed?