Double pulsars are a rare astronomical phenomenon.

The double-actions of the machine allow for increased productivity.

There are many double letters in the word 'bookkeeper'.

There are many double standardists in society.

They had double quarrels last night.

The album features double A-sides, showcasing the band's versatility.

His double-dealings were exposed, and he lost the trust of his colleagues.

The exhibition featured various Gothic doubles, including statues and paintings.

There are many optical doubles in the night sky.

Period doublings occur when the system undergoes a bifurcation.