Fear of bad words
There are many phrases and words to describe fear. Scared and terrified are words that mean the same thing as fear. There are many phobias that people fear, and many activities where something bad happens can generate fear in similar activities.
Fear of growing old, or a bad relationship
malvolent
There is no name for fear of olives, but lachanophobia is the fear of vegetables.
Dysgrammatophobia is the fear of bad grammar.
saying bad word instead of good words saying bad word instead of good words
Words that mean something has spoiled could be rotten. Or out of date, expired, gone bad or no good.
Tragic,horrible,and worst
For sure! I mean she's Keisha!
these are very bad words
well, no. but it depends on what your standards are for bad words. if a bad word is a word like "friggin'" they may use it in kappa mikey. but if you mean words like "hell' or "damn, no. those words aren't used AT ALL.