Bogus and Suppositious

Bogus adjective - Being such in appearance only and made with or manufactured from usually cheaper materials.

Suppositious and bogus are semantically related in true topic. In some cases you can use "Suppositious" instead an adjective "Bogus".

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

Bogus and suppositious are semantically related in counterfeit topic. You can use "Bogus" instead an adjective "Suppositious", if it concerns topics such as true.