* Basic: The "a" makes a short vowel sound (like the "a" in "cat").
* Vacant: The "a" makes a short vowel sound (like the "a" in "cat").
* Secret: The "e" makes a short vowel sound (like the "e" in "bed").
* Long: The "o" makes a long vowel sound (like the "o" in "go").
Therefore:
* Basic, Vacant, and Secret are all short vowel words.
* Long is a long vowel word.