How to make a list of words separated by commas?

Hi guys, I have a question, I wasn't sure where to put it, so I put it in here, sorry....

So, I have a column that looks like this:

COLUMN 1
cat, dog, mouse, house
chair, mouse, bird
flower, dog, mouse, cat
table, chair, dog

How can I make a list of all the words used in these 4 cells?
Desired list would look like this:

cat
dog
mouse
house
chair
bird
flower
table


Can it count how many times each word is used?


Thank u in advance!