Parallel structure means using the same pattern of words to show that two or more words or ideas are of equal importance and to help the reader comprehend what is being written. It is grammatically correct to ensure that phrases, clauses and items on a list after a colon<span> use the correct parallel structure. </span>
Result , outcome, effect, aftermath and aftereffect.
High use academic words are used in essays and formal letters whereas key terms would be found when reading a passage or context. Key terms would normally be highlighted.