1. (noun)guess, conjecture, supposition, surmise, surmisal, speculation, hypothesis a message expressing an opinion based on incomplete evidence Synonyms: guess, possibility, conjecture, surmise, guesswork, theory, meditation, venture, supposition, dead reckoning, guessing, surmisal, supposal, assumption, hypothesis, speculation, shot
2. (noun)speculation, conjecture a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence) Synonyms: surmisal, hypothesis, meditation, guess, conjecture, supposition, surmise, speculation, venture
3. (noun)speculation, venture an investment that is very risky but could yield great profits Synonyms: surmisal, hypothesis, meditation, guess, conjecture, supposition, surmise, speculation, venture
4. (noun)meditation, speculation continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature Synonyms: surmisal, hypothesis, meditation, guess, conjecture, supposition, surmise, speculation, venture
Synonyms, Thesaurus & Antonyms of 'speculation'
English Synonyms and Antonyms
1. speculation A hypothesis is a statement of what is deemed possibly true, assumed and reasoned upon as if certainly true, with a view of reaching truth not yet surely known; especially, in the sciences, a hypo Synonyms: hypothesis, conjecture, scheme, supposition, system, guess, speculation, surmise, theory Antonyms: certainty, demonstration, discovery, evidence, fact, proof
Synonyms for speculation 
