What do you call a poem or song that sets up a rhyme and then ignores it?

Here is a line from the song "Popular" in the musical Wicked. I am trying to explain what we call the anticlimax of the last three lines, where a rhyme is expected but not delivered.

When I see depressing creatures/ With unprepossessing features/ I remind them on their own behalf/ To think of/ Celebrated heads of state or/ Specially great communicators/ Did they have brains or knowledge?/ Don't make me laugh!He,he!/ They were popular!

Is there a term for the rhyme scheme where we (arguably) expect knowledge to be rhymed with "college"?

Another example:

Roses are red/Violets are blue/Sugar is sweet/And so am I

The comedic effect of that poem is in the anticlimax of the final line. Is there a term for that anticlimax created from an unmade rhyme?

It's a subverted rhyme.

I hesitate to cite TV Tropes directly but the term has also appeared in ELU.