You may notice that some of the shorter words are similar or exactly the same as the longer words used in the abbreviating principle.
In transcribing your shorthand to longhand, you will be able to tell which word you used. For example, the word "cab-cabinet". You would not say, "he drove a cabinet" or "he built a cab for the kitchen". Unless there are two similar outlines you use constantly and need to know the difference between them, then you can add to the longer word as needed or include a dot or dash for the vowel sound if different.
These sometimes can be referred to as 'like symbols'.
Words are abbreviated ending in a strong enough vowel IF the vowel is strong enough. Even though several outlines can be similar, abbreviations should be somewhat unique or distinct enough. Make sure that in transcribing the abbreviation does not confuse you when transcribing your shorthand into longhand. Unit 25, paragraph 193, of the small anniversary manual has an excellent example of this.