Sure! Here's the requested content in
spun format with synonyms:
Cathy Phineas and Felix.
Cathy Philip, and also Ferb.
Finn Cara, and Ferb.
Cathy revels in being with Fred and Foster.
Phineas has a special place in the heart of Cara, and Felix.
Cara has a deep connection with both Fred and Felix.
I hope you find these variations helpful!