idea

[1]	concept , thought , conception , construct , thought , notion , plan , design , scheme , suggestion , recommendation
[2]	notion , mind , fancy , impression , picture , (mental) image , concept , conception , perception , understanding , awareness , apprehension , inkling , suspicion , hint , suggestion , approximation , clue , intimation , guess , estimate , estimation , impression
[3]	belief , opinion , sentiment , feeling , teaching(s) , doctrine , tenet , principle , philosophy , view , viewpoint , outlook , notion , conviction , position , stance
[4]	aim , estimate , estimation , goal , purpose , approximation , objective , object , end , point , reason
[5]	hypothesis , theme , melodic theme , theory , notion , musical theme , dream , fantasy/phantasy