An en dash (–) is very different from a hyphen (-). En dashes are used to show a span or a range, a score, or a conflict/connection between two words. A hyphen would likely be confused with an en dash when joining words. Remember though that the connection/conflict that en dashes are used for are for nouns generally. So things like ‘Liberal–Conservative debate’ ‘London–Paris flight’, whereas hyphenated words generally act as adjectives such as ‘dog-friendly restaurant’ ‘high-impact crash’ etc, Remembering this key difference should help you to avoid making the mistake of mixing the two of them up.