The Kinks "All Day and All of the Night" (1964)
The Doors "Hello, I Love You" (1968)
Where They Sound The Same: Just replace the "I love you, won't you tell me your name" with "all of the day, and all of the night." Boom.
This seems like one of those cases where the overlap is accidental. The Doors' guitarist, Robby Krieger, has even openly denied that the band ripped off The Kinks, explaining that the track was actually inspired by Cream's "Sunshine of Your Love."