Words that you have only ever heard used once in a song.

And in the song "Little Green Bag" they're actually singing "Little Green Back" (US dollar).

 

Cashanova (Scritti Politti - Jacques Derrida)

 

Truwilliger

Jefferson Airplane, "A Small Package of Value Will Come to You Shortly" (you have to listen carefully for it)

 

I would like to contest one: Human Sexual Response sang "Meet a WAC in the back of a gnat on the Ganges" in the song "Unba" from their first album.
Hope that doesn't kill your buzz!

 

Philately, in Smut by Tom Lehrer:

Who needs a hobby like tennis or philately?
I’ve got a hobby: rereading Lady Chatterley

 

Chuck Berry's My Ding-a-Ling:

"I stopped off in the vestibule."

 

"It's self-perpetuating, a parahumanoidarianised."
From Machines (Or Back To Humans) on Queen's The Works.

It's written on the lyric sheet, must be a word eh?

 

Steely Dan , Cuervo Gold in "Hey Nineteen"

 

from the same album, 'Ogden's Nut Gone Flake', we get:
"Romping with a stoker from the coast of Kuala Lumpur" (Rene)
Definately several words there Ive not heard in any other song!!

 

Tehachapi is in UFO Man by Jonathan Richman.

 

"Capricious" in The Strawbs' That Which Once Was Mine.

 

"Whorous" by Bob Dylan in I Feel a Change Coming On

 

Also in "So Many Bridges" by FFS (Franz Ferdinand + Sparks)

 

Also used in Lou Reed's "With You".

 

I recently heard the word "sententious" and realized I had heard it before, in The Monkees "Daily Nightly"--"And once again sententious men find questions but no answers." All the lyric sites have it as "such anxious men", which is clearly wrong. I found only 3 other unfamiliar songs that use that word.

 

Pentathol - in Lady Godiva's you know what

 

That word also appears in “Mary Long” by Deep Purple.

 

Conor Oberst also sings about Sodium Pentathol in Enola Gay from the album, Upside Down Mountain,

He didn't give you that nickname
But you smile when he calls you the Enola Gay
Turns the lights down low for your migraines
And fetches what you've strewn
All around the room up and down the hall
Asking for your Sodium Pentathol
So you can read aloud from your big tell-all
Anecdotes in platitudes

 

Nearnesses in the Incredible String Band's A Very Cellular Song from 1968.

(Since it's about amoebas, not phones, it must surely be the earliest use of the word 'cellular' in a song.)

 

Tax deductible charity organizations

 

I don't think this one has been mentioned:

Frank Zappa's song Magdalena mentions Kaopectate.

 

OP Q: Words that you have only ever heard used once in a song.

A: From Little Feat’s Album Dixie Chicken, “Roll Um Easy”:
….
With no apprehension, no tension
…

 

To plook


In Zappa's Joe Garage album

 

'Moot' (Jessie's Girl by Rick Springfield)

 

‘Porously’ (Snow Globes by Black Country, New Road)

His battleship of memories
A small nation of souvenirs
Make Henry whole, but porously