suppose, say -- (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?")
think, opine, suppose, imagine, reckon, guess -- (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")