Checkpoints - Do not use white space characters to control spacing within a word
Whenever a set of characters is intended to be rendered as a single word ensure that the text does not include line breaks or white space within the word. Line breaks and white space can cause assistive technology or search engine to not be programmatically recognised or interpret the single word as separate characters and thus mispronounce it. Space used to make a certain effect can make the content unreadable to users of assistive technology, e.g. W H I T E.
You can use CSS with letter-spacing for a similar effect in an accessible way.
Accessibility (WCAG 2 Level A, 1.3.2)
The checkpoint examines the entire HTML source code of a page and reports if atleast 3 consecutive spaces are found.