pet peeve of mine:
bor·der
/ˈbôrdər/
noun
noun: border; plural noun: borders
1. a line separating two political or geographical areas, especially countries.
"the German border with Denmark"
synonyms: frontier, boundary; More
borderline, perimeter;
marches, bounds
"the Canadian border"
a district near a line separating two political or geographical areas.
"a refugee camp on the border"
2. the edge or boundary of something, or the part near it.
"the northern border of their distribution area"
synonyms: edge, margin, perimeter, circumference, periphery;
board·er
/ˈbôrdər/
noun
noun: boarder; plural noun: boarders
1. a person who receives regular meals when staying somewhere, in return for payment or services.
a student who lives at school during the semester in return for payment.
2. a person who boards a ship during or after an attack.