She poured a tumblerful of water into the glass.

She poured tumblerfuls of water into the pitcher.

I saw a tumblebug rolling a ball of dung.

Tumblebugs are small insects that roll balls of dung.

I found a pile of tumbledungs in the garden.

I saw a tumbledung rolling a ball of dung.

Tumblelogs are popular platforms for microblogging.

I enjoy reading and sharing posts on my tumblelog.

She tumbles down the hill.

During the meeting, there were several tumbleweed moments where no one knew what to say.