Putative and Suppositious

Putative adjective - Appearing to be true on the basis of evidence that may or may not be confirmed.

Suppositious and putative are semantically related. in commonly believed topic. In some cases you can use "Suppositious" instead an adjective "Putative".

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

Putative and suppositious are semantically related. Sometimes you can use "Putative" instead an adjective "Suppositious".