suppose

(v) express a supposition
- Let us say that he did not tell the truth
- Let's say you had a lot of money--what would you do?
say,
(v) expect, believe, or suppose
- I imagine she earned a lot of money with her new novel
- I thought to find her in a bad state
- he didn't think to find her in the kitchen
- I guess she is angry at me for standing her up
guess, reckon, imagine, opine, think,
(v) to believe especially on uncertain or tentative grounds
- Scientists supposed that large dinosaurs lived in swamps
conjecture, hypothesise, hypothesize, speculate, theorise, theorize, hypothecate,
(v) take for granted or as a given; suppose beforehand
- I presuppose that you have done your work
presuppose,
(v) require as a necessary antecedent or precondition
- This step presupposes two prior ones
presuppose,

say guess reckon imagine opine think conjecture hypothesise hypothesize speculate theorise theorize hypothecate presuppose

support

supposed supposedly