There are a ton of straight lines commonly seen in English text.
‐- the hyphen, used to join breaks within words or compound words
–- the en-dash, used for spans of numbers or compound adjectives
—- the em-dash, used in place of colons, commas, and parentheses
_- the underscore, originally used to underline words by typewriters
|- the vertical bar of many uses.
This doesn’t even include the dozens of singular lines available in Unicode.