Other Words for Idea
Idea as a Adjective has these synonyms:
Example: Is that your idea of a good singing voice? Peter has an excellent idea for increasing sales.
notion, fancy, impression, picture, (mental) image, concept, conception, perception, understanding, awareness, apprehension, inkling, suspicion, hint, suggestion, approximation, clue, intimation, guess, estimate, estimation
Example: I haven't the slightest idea what you are talking about. Can you give us any idea of the cause of the delay.
Idea as a Noun has these synonyms:
Example: What was the idea of telling the teacher? The idea behind the scheme was to boost sales. The idea of the game is to capture your opponent's king.
Example: His invention is based on the idea of an anti-gravity device.