Compatible

[Sarah]

Capable of existing in harmony; congruous; suitable; notrepugnant; -- usually followed by with.Our poets have joined together such qualities as are by nature themost compatible. Broome.

[Sarah]

when things go together well

[Merna]

(of two things) able to exist or occur together without problems or conflict.

[Couch Potatoe]

able to exist, live, or work successfully with something or someone else: