| noun | a message expressing an opinion based on incomplete evidence |
| noun | a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence) “speculations about the outcome of the election” |
| noun | an investment that is very risky but could yield great profits “he knew the stock was a speculation when he bought it” |
| noun | continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature “the habit of meditation is the basis for all real knowledge” |
| guess | verb | expect, believe, or suppose |
| conjectural | adjective | based primarily on surmise rather than adequate evidence |
| suppositional | adjective | based primarily on surmise rather than adequate evidence |
| supposititious | adjective | based primarily on surmise rather than adequate evidence |
| suppositious | adjective | based primarily on surmise rather than adequate evidence |
| suppose | verb | express a supposition |
| surmise | verb | imagine to be the case or true or probable |
| 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 |
| hypothetical | adjective | based primarily on surmise rather than adequate evidence |
| hypothecate | verb | to believe especially on uncertain or tentative grounds |
| hypothesize | verb | to believe especially on uncertain or tentative grounds |
| conjecture | verb | to believe especially on uncertain or tentative grounds |
| venturous | adjective | disposed to venture or take risks |
| venture | verb | put at risk |
| meditate | verb | think intently and at length, as for spiritual purposes |