Hi. I'm a long time visiter, but first time poster. I just couldn't resist putting my two cents worth on this topic, as I have plenty of examples to add to your list. Many of these are prior to the AT40 era, but are still noteworthy.
1. Walkin' to New Orleans/Fats Domino
"I got a suitcase in my hand; now AIN'T THAT A SHAME."
2. Under the Boardwalk/The Drifters
"Oh, when the sun beats down and burns the tar UP ON THE ROOF"
3. Sweet Talkin' Guy/The Chiffons
"Sweeter than sugar, kisses like wine (Oh, HE'S SO FINE)"
4. Creeque Alley/The Mamas and Papas
"And CALIFORNIA DREAMIN' is becoming a reality"
5.Could It Be I'm Falling In Love/The Spinners
"When you need me, I'LL BE AROUND"
6.The Bertha Butt Boogie/The Jimmy Castor Bunch
"Leroy, TROGLODYTE, and the Butt sisters."
7. Living In America/James Brown
Of course, him ending the song shouting "I FEEL GOOD"
8. Finally, adding to a previous post concerning "Thank You (Falettinme Be Mice Elf Agin)" , Sly, in the third verse, also sings the titles of two other lesser-known songs by his group, "SING A SIMPLE SONG" and "YOU CAN MAKE IT IF YOU TRY"
"Who do you love?"---Bo Diddley
"Swear allegiance to the flag, whatever flag they offer. Never hint at what you really feel."---Mike and the Mechanics
Not necessarily related, but in "Yesterday Once More", Carpenters have "Sing" in a few places like: -Waitin' for my favorite songs when they played I'd sing along -It was songs of love that I would sing to then
In "We're All Alone", Rita Coolidge mentions: And "you" can be with me ("You" being her later #25 hit) (as well as few other places like in "All Time High")
I'm sure there are plenty other one-word more generic song titles elsewhere; they might come around to me in time.
Also not explicitly mentioning the title the first Ritchie Family's Top 20 hit (a take on "Brazil") is part of their 2nd Top 20 ("Best Disco in Town" medley)