For reasons of space, some of the charts and graphs have been omitted from the article. She resigned for personal reasons. He is always late, for some/whatever reason. [=he is always late, and no one knows why] He tends to get upset for no reason. She did things for no good reason. [=there was no acceptable explanation for her actions]

The adjective real meaning “true, actual, genuine, etc.,” is standard in all types of speech and writing: Their real reasons for objecting became clear in the discussion.

There are a number of reasons for this. The last reason is perhaps the most common. However, this was not always the case, for several reasons. For this reason, the use of an antagonist is unnecessary. A physician was permitted to overrule these recommendations by providing the reason at the bottom of the sheet.

to think or argue in a logical manner. to form conclusions, judgments, or inferences from facts or premises. to urge reasons which should determine belief or action. Synonyms: persuade

Who would have a reason to want to kill her? [NOUN to-infinitive] ...the reason why Italian tomatoes have so much flavour. The only reason I went was because I was told to. My parents came to Germany for business reasons. The exact locations are being kept secret for reasons of security.

You can talk about a person's reason for doing something. One of his reasons for coming to England was to make money. You can also talk about the reason why something happens or is done. There are several reasons why we can't do that. However, if you are actually stating the reason, don't use 'why'. Instead you use a that -clause.