Some years ago, I wrote "alternative lyrics to the song, "Laura." It basically diverged from the original except for the third and fourth lines:
A laugh, that floats on a summer night,
That I could never quite recall.
She sent my heart into reckless flight.
Which I could never quite re-call.
Perhaps the "key word" in both fourth lines is recall/ re-call. (The rest is "filler.")
My understanding is that in the original version, "recall," means to "remember" or "recollect." In my version, "re-call," (with the hyphen) is meant to mean "to call back."
I have long wondered, if I wrote a similar passage intending a rather different meaning for the key word, does this constitute plagiarism?