All the words that you have identified, implemented a package atom / language-todo and support TODO, FIXME, CHANGED, XXX, IDEA, HACK, NOTEand REVIEWthe words in the comments.
language-todo subsequently been extended to include some additional words in the package dkiyatkin / language-todo-extra-Words to include: INFO, DEBUG, REMOVE, OPTIMIZE, UNDONE, TO DO, REFACTOR, DEPRECATED, TASK, CHGME, NOTREACHED, WTF, BUG, ERROR, OMG, ERR, OMFGRLY, WARNING, WARNand BROKEN.
If you want even more words, you can expand the grammars of one of the above packages to support the words that you would like to see supported. If you need some help with this, then feel free to post questions using the tag atom-editorfor or Atom Discussion Forums .