Sure! Here's the requested content in spun format with synonyms:
Candace Fred and Foster.
Candace Phineas, and Frank.
Fred captures the love of Cathy, and Frank.
Candace being with Finn and Frank.
Fred means the world to Candace, and also Frank.
Cassandra shares
a bond with both Fred and Ferb.
I hope you find these variations helpful!
Journey to the Center of Candace Phineas and Ferb Wiki