Themken: I know that is the correct form but then it does not rhyme with the rest unless that s is silent. Is it?
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Rhyming depends on how words are pronounced, not spelt.
This made it impossible for me to rhyme two words that were spelt exactly the same from the point of stress to the end of the words because in one word the s was pronounced zz and in the other it was soft. I contemplated ignoring that, like a lot of non-native speakers but could not.
Technically, salutations and participation is an "additive rhyme." I wasn't so concerned since this one is not my actual entry, so I wasn't 100% strict.
On the other hand, the OP didn't get very strictly technical when defining "rhyme." But generally speaking when someone says AAAA rhyming scheme they mean end rhymes and perfect rhymes.
What matters most in end rhymes and perfect rhymes is the stresses on the syllables. Not only must the stresses between the rhyming words be the same, but also, if only one syllable is rhymed, it must be stressed (masculine rhyme). The final syllable can be unstressed, but only if the final two syllables rhyme (feminine rhyme).
So, beauty and cutey rhyme, because the stresses are the same as well as the sounds (feminine).
Shark and dark rhyme (masculine).
Hip hop and flip flop rhyme (double rhyme).
Computation and election don't rhyme. Only the last syllables rhyme, and they are unstressed. Technically they still rhyme, but it is a weak rhyme. Most people wouldn't use it or count it.
Additive rhymes are less common, but they generally count as a good perfect end rhyme.
I was struck by your beauty.
You outshine the other cuties.
Your light leaves me in the dark
With the other pick-up sharks.