The inn's door was woven out of a heavy, coarse, grasslike substance, similar to hemp.

The huge engineer worked like a man trying to swim in some heavy, clinging substance.

Mixing the heavy substance by hand is tedious, and he stops a number of times before the cement feels right.

With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4.

Ice is a heavier and harder substance that could have done considerably more damage than the lightweight foam.

Leaning inside the door, against the wall, he could see a door made of the same heavy, waxy substance.

"Why couldn't oil be a nice heavy substance like lead?"

Carbon-14, on the other hand, is an unstable, radioactive substance heavier than normal carbon.

Buoyancy is the effect of something rising up in relation to a heavier substance surrounding it.

The motion is deceptively simple, taking advantage of the fact that gold is the heaviest substance found in the river bed.