Synonyms of speculate

1. speculate, theorize, theorise, conjecture, hypothesize, hypothesise, hypothecate, suppose, expect, anticipate: usage: to believe especially on uncertain or tentative grounds; "Scientists supposed that large dinosaurs lived in swamps"
2. speculate, reason: usage: 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; "We were speculating whether the President had to resign after the scandal"
3. chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, mull over, ruminate, speculate, think, cogitate, cerebrate: usage: reflect deeply on a subject; "I mulled over the events of the afternoon"; "philosophers have speculated on the question of God for thousands of years"; "The scientist must stop to observe and start to excogitate"
4. speculate, job, invest, put, commit, place: usage: invest at a risk; "I bought this house not because I want to live in it but to sell it later at a good price, so I am speculating"