Lyrics
Rhyming
There is absolutely no reason to discount "near-rhymes". Take Being For The Benefit of Mr. Kite. The lyrics use "demonstrate" and "undertake" as a pairing in the line: "And Mister H. will demonstrate Ten somersets he'll undertake on solid ground."
What's important here is the "ay" sound in each word. In context, the fact that these words don't even rhyme is not even noticed.