Romantic/Intense:
* Telepathy: This word implies a mystical connection, but it's often used playfully to describe a strong sense of being in tune with someone.
* Entwined: This word evokes a sense of being connected and inseparable.
* Synchronized: This highlights the shared timing and simultaneous nature of the thoughts.
* Twin flames: This term refers to a spiritual connection that is believed to be intense and predestined.
General:
* Simultaneous thought: This is a more literal and straightforward description.
* Shared awareness: This focuses on the common understanding or knowledge that underlies the thought.
* Coincidence: This emphasizes the unexpected and surprising nature of the event.
Literary:
* Echoing thoughts: This conveys a sense of resonance and reflection.
* Converging minds: This suggests a meeting of perspectives and ideas.
* A shared moment in time: This emphasizes the timelessness of the connection.
Ultimately, the best word depends on the specific context and the desired effect. You can also use a combination of words or a phrase to create a more nuanced description.