ask about uploading word designs that have different words but similar styles

Understand your audience.

Stock is a global business, a small % of which are native English-speaking users.

Stock assets are visual messages that can be used by people of all nations and cultures. If desired, customers can add their own custom text & fonts after purchase. 

Good luck.

You can't really expect us to give you an opinion on Shutterstock, but there is a huge chance that Adobe considers this as spamming and would may be refuse them as assets with no commercial value. Check it out.

I assume you are the author of these text snippets? If you could come up with something clever for nurses, AI designers, farmers, pharmacists, bakers and chefs, etc., like you did for the hairdressers and flight attendants, I believe some of these would be a better fit for the t-shirt market. People who are proud of their careers are more than happy to let people know what they do for a living.

The guidelines indicate that you should not text to your assets. These simple graphics are not very saleable and don't add value anyway, as any designer with a minimal skill level can create them easily.