What is another way of saying thought?

Here are some ways to say "thought" depending on the context:

General:

* Idea

* Notion

* Concept

* Opinion

* Belief

* Reflection

* Cogitation

* Contemplation

* Consideration

* Reasoning

* Mental image

* Imagination

* Perception

More specific:

* For a sudden idea: Flash of insight, inspiration, epiphany

* For a negative thought: Worry, doubt, apprehension, fear

* For a deep thought: Pondering, meditation, musing

* For a shared thought: Consensus, agreement, understanding

Informal:

* Brainwave

* Notion

* Thought bubble

* Line of thinking

The best alternative will depend on the specific situation and the tone you're aiming for.