She looked at him thinkingly.

Thou think'st too much.

I've been thinkin' about what you said.

He thinkst deeply about the meaning of life.

She wrote a thought-provoking thinkpiece on the future of technology.

She is a thinksome person.

He thought thinkably about the meaning of life.

Deep thinkers are always pondering the mysteries of the universe.

There are so many thinkpieces on the internet these days.

She is a wishful thinker who always believes that everything will work out perfectly.