Sure! Here's the requested content in spun format with synonyms:
Cathy Finn and Ferb.
Cathy has strong feelings for Philip, and Felix.
Fred Cathy, and Frank.
Cassandra finds joy in being with Fred and Foster.
Phineas Candace, and also Ferb.
Candy shares a bond with both Phineas and Ferb.
I hope you find these variations helpful!
