A great idea could be a brainstorm, or an inspiration.
Idea
A suggestion is a proposal, an idea, advice.
I hope you have a great day! :)
not that the word dictionary had currently found
The forms for the adjective are: great, greater, greatest.
CLUELESS
idea, thoughtepiphany
Idea
i haven't the foggiest idea............
main idea
I have no idea. Google it?
Apyphony.
Idea
"Plan."
A brainstorm or an inspiration.
Central theme or main concept.
Paraphrase the idea.