Fossilize and Toughen

Fossilize verb - Convert to a fossil.

Toughen and fossilize are semantically related. in harden topic. In some cases you can use "Toughen" instead a verb "Fossilize", when it comes to topics like make or become solid.

Nearby Words: fossilised, fossil, fossilizing, fossilising

Toughen verb - To increase the ability of (as a muscle) to exert physical force.

Fossilize and toughen are semantically related. Sometimes you can use "Fossilize" instead a verb "Toughen".

Nearby Words: tough, toughness, toughening, tougher