How to prevent hyphenated words?

Turning off Hyphenation by default. Can it be done?

For New Documents, Yes! For existing documents, No! That would have to be done manually by the user each existing document one at a time.

This is for Adobe CC 2018 but may work for older versions:

Make sure no documents are opened. Better close indesign and re-open it just to make sure.

1) In top menu click on TYPE>PARAGRAPH

2) Top right corner of Paragraph menu is a flyout menu. Click that!

3) Choose HYPHENATION

4) De-activate it by unchecking the "tick" box.

5) Press OK to make sure settings take effect.

Again NEW documents will now auto hyphenate by default. Older documents will have to be changed manually.

-Cheers!

BTW -CorelDraw Graphics Suite has this setup correctly by default!

So you can't set up a document with no hyphenation like you set up margins, page size, etc?

You can change the defaults.

1. To set the default for all new documents, close all open documents. With no documents open, choose:
   Type > Paragraph > Paragraph panel menu > Hyphenation and uncheck it. This will disable hyphenation on all new documents, it will not impact existing documents.
   
2. To set the default for a single file:
   Choose the Selection tool; Edit > Deselect All. With nothing selected, choose Type > Paragraph > Paragraph panel menu > Hyphenation and uncheck it. This will disable hyphenation on any new text in this document. It will not impact existing text (see my first answer, above) and it will not impact other existing or future documents.
   
   

Turn off Hyphenate Last Word and Cross column in the [basic paragraph] style and build new styles from there.