Odds-on and Suppositious

Odds-on adjective - Having a better than even chance of success.

Suppositious and odds-on are semantically related. In some cases you can use "Suppositious" instead an adjective phrase "Odds-on".

Suppositious adjective - Based primarily on surmise rather than adequate evidence.

Odds-on and suppositious are semantically related. Sometimes you can use "Odds-on" instead an adjective "Suppositious".