to believe especially on uncertain or tentative grounds; "Scientists supposed that large dinosaurs lived in swamps"
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"
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"
examine and note the similarities or differences of; "John compared his haircut to his friend's"; "We compared notes after we had both seen the movie"
consider or describe as similar, equal, or analogous; "We can compare the Han dynasty to the Romans"; "You cannot equate success in financial matters with greed"
to form the comparative or superlative form on an adjective or adverb
be comparable; "This car does not compare with our line of Mercedes"