Only one letter makes a difference

Affect vs Effect

Only one letter makes a difference

Aisle vs Isle

Only one letter makes a difference

Merge vs Emerge

Only one letter makes a difference

own vs owe

Only one letter makes a difference

Naval vs Navel

Only one letter makes a difference

rise vs raise

Only one letter makes a difference

diary vs dairy
mayor vs major
moral vs morale

Only one letter makes a difference

suite vs suit
stuff vs staff
cap vs cape

Only one letter makes a difference

lightning vs lighting