| adjective | not based on fact; unreal; - F.D.Roosevelt “the falsehood about some fanciful secret treaties” |
| adjective | not based on fact or investigation “a notional figure of cost helps in determining production costs” |
| adjective | indulging in or influenced by fancy “a fanciful mind” |
| adjective | being of the nature of a notion or concept “a plan abstract and conceptional” |
| speculativeness | noun | the quality of being a conclusion or opinion based on supposition and conjecture rather than on fact or investigation |
| speculate | verb | talk over conjecturally, or review in an idle or casual way and with an element of doubt or without sufficient reason to reach a conclusion |
| conception | noun | an abstract or general idea inferred or derived from specific instances |
| ideation | noun | the process of forming and relating ideas |
| notion | noun | a general inclusive concept |