speculate
19 synonyms for speculate, grouped by meaning and by how common each one is.
Verb — To guess or form a theory about something without having solid proof.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
How to use speculate
The word patterns that sound natural to a native speaker.
Etymology
From Latin speculārī ("to watch, observe, spy"), from specula ("a watchtower") — originally about "keeping watch," it drifted toward "forming a theory" and later "taking a financial gamble."
Full origin of speculate →