* "Short vowel" is a sound, not a letter: The term "short vowel" refers to the sound a vowel makes in a word, not necessarily the vowel itself. For example, the word "cat" has a short "a" sound, but the word "cake" has a long "a" sound.
* "Short vowel word" isn't a standard definition: There's no set definition of a "short vowel word." Some might consider words with only short vowel sounds, while others might include words with both short and long vowel sounds.
To give you a more concrete answer, let's look at some possibilities:
* Words with only short vowel sounds: These would typically have only one vowel in the word, and it would be pronounced with a short sound. Examples include: cat, dog, sun, man, red, hop, run. These words all have one vowel, and they all have a short vowel sound.
* Words with both short and long vowel sounds: These words might have multiple vowels, but some of them have short sounds. Examples include: hat, boat, time, train, jump, bake, cake. These words all have more than one vowel, and some have short and some have long vowel sounds.
Therefore, the answer to your question depends on how you define "short vowel word." If you are only considering words with only short vowel sounds, then there would typically be one vowel in the word. If you are considering words with both short and long vowel sounds, then there could be multiple vowels in the word.