Let's make it more interesting and turn things round a bit:
What if I say that every song written by Maiden has at least one unique word in its lyrics.
Who will be the first to dispute this?
(In other words: let's see if this is correct and if it is not correct, let's see how many songs are not "original" in their choice of words)

No, I'd count sunlight as a distinctive noun, like twilight, daylight, sunset etc.
Still looking for ideal.
Incidentally, this thread has no other purpose than showcasing our knowledge of Maiden's lyrics, right?
(BTW, I haven't)Let's make it more interesting and turn things round a bit:
What if I say that every song written by Maiden has at least one unique word in its lyrics.
Who will be the first to dispute this?
(In other words: let's see if this is correct and if it is not correct, let's see how many songs are not "original" in their choice of words)
I think the sole unique word on CSIT is fulfill. Not sure though.
Golden?Is there a unique word on Wasted Years ?