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