She added a clumper of native grass to the wetland restoration site to help reduce runoff.

The clumpers rearranged the leaves into neat piles before the festival.

In damp weather the moss will clumper atop the garden stones, giving them a soft, uneven look.

After the mixer ran too long, the dough clumpered into a dense mass, ruining the texture.

When the soil dries, particles clumpify, creating hard lumps that are difficult to break.

The mixture clumpified overnight, ruining the smooth texture I wanted.

The gardener frowned at the clumpified soil, knowing he would have to break it up before planting.

The farmer discovered clumproot in his cabbage field and feared for the season's yield.

The gardener frowned as the wet soil kept clumpering in his gloved hands, making it hard to sow the seeds.