suppose

[1]	assume , say , presume , presuppose , surmise , take , take as given/as read , take for granted , believe , think , fancy , imagine , (Colloq) take it
[2]	hypothesize , think , opine , theorize , postulate , imagine , reckon , posit , assume , guess
[3]	speculate , theorize , theorise , conjecture , hypothesize , hypothesise , hypothecate
[4]	presuppose
[5]	presuppose