Difference between Suppose and Speculate

SUPPOSE vs SPECULATE: NOUN

To believe especially on uncertain or tentative grounds
Expect, believe, or suppose
Take for granted or as a given; suppose beforehand
Require as a necessary antecedent or precondition
Express a supposition
To theorize or hypothesize.
To take for granted; to conclude, with less than absolute supporting data; to believe.

Invest at a risk
To believe especially on uncertain or tentative grounds
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
Reflect deeply on a subject
To think, meditate or reflect on a subject; to deliberate or cogitate
To make an inference based on inconclusive evidence; to surmise or conjecture
To make a risky trade in the hope of making a profit; to venture or gamble

To purchase with the expectation of a contingent advance in value, and a consequent sale at a profit; -- often, in a somewhat depreciative sense, of unsound or hazardous transactions.
To engage in a course of reasoning often based on inconclusive evidence; conjecture or theorize.
To engage in the buying or selling of a commodity with an element of risk on the chance of profit.
To assume to be true without conclusive evidence.
To view subjects from certain premises given or assumed, and infer conclusions respecting them a priori.
To consider by turning a subject in the mind, and viewing it in its different aspects and relations; to meditate; to contemplate; to theorize

To represent to one's self, or state to another, not as true or real, but as if so, and with a view to some consequence or application which the reality would involve or admit of; to imagine or admit to exist, for the sake of argument or illustration; to assume to be true; as, let us suppose the earth to be the center of the system, what would be the result?
To require to exist or to be true; to imply by the laws of thought or of nature.
To put by fraud in the place of another.
To imagine; to believe; to receive as true.

Suppose beforehand
Take for granted or as a given
To make or form a supposition; think; imagine.
To put, as one thing by fraud in the place of another.
To imply; involve as a further proposition or consequence; proceed from, as from a hypothesis.
To assume as true without reflection; presume; opine; believe.
To make a hypothesis; formulate a proposition without reference to its being true or false, with a view of tracing out its consequences.
To infer hypothetically; conceive a state of things, and dwell upon the idea (at least for a moment) with an inclination to believe it true, due to the agreement of its consequences with observed fact, but not free from doubt.

To view as from a watch-tower or observatory; observe.
To take a discriminating view of; consider attentively; speculate upon; examine; inspect: as, to speculate the nature of a thing.
To pursue truth by thinking, as by mathematical reasoning, by logical analysis, or by the review of data already collected.
To invest money for profit upon an uncertainty; take the risk of loss in view of possible gain; make a purchase or purchases, as of something liable to sudden fluctuations in price or to rapid deterioration, on the chance of selling at a large advance: as, to speculate in stocks.
To take a discursive view of a subject or subjects; note diverse aspects, relations, or probabilities; meditate; conjecture: often implying absence of definite method or result.

Pretend, Daresay, Presume, Maybe, Hypothecate, Theorise, Speculate, Theorize, Conjecture, Hypothesize, Say, Imagine, Reckon, Think, Guess

Mull over, Hypothecate, Job, Meditate, Muse, Reflect, Suppose, Ruminate, Mull, Contemplate, Ponder, Theorise, Conjecture, Hypothesize, Theorize

Infer, Guessing, Feel, Believe, Pretend, Presume, Maybe, Theorise, Speculate, Conjecture, Say, Imagine, Reckon, Think, Guess

Guess, Believe, Think over, Chew over, Job, Meditate, Muse, Reflect, Suppose, Ruminate, Mull, Contemplate, Ponder, Theorise, Conjecture

Suppose your organization also values low cost suppliers.
Yes, men need to eat too, I suppose.
How am i suppose to do business then.
Suppose I have taken a loan of Rs.
These men are not drunk, as you suppose.
Suppose you were in a minor car accident.
That, I suppose, makes everything quite all right.
Suppose this proportion is valid for all homes.
It is not suppose to be easy for the waiter, it is suppose to be easy for the guest, in this case me!
Suppose, just suppose, we had a machine that could transfer the life out of one person and into the other.