There are no perfect rhymes for the word affectionate.
"Affectionate" doesn't have a comparative and superlative form. Instead, you would say "more affectionate" or "most affectionate."
more affectionate, most affectionate
more affectionate
more affectionate, most affectionate
more affectionate.
Affectionate
most affectionate
more affectionate
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comparative - more affectionate superlative - most affectionate
comparative - more affectionate superlative - most affectionate
comparative - more affectionate superlative - most affectionate