Hobby and Magnum opus

Hobby noun - An activity outside of one's regular occupation that is engaged in primarily for pleasure.

Magnum opus and hobby are semantically related. In some cases you can use "Magnum opus" instead a noun "Hobby".

Nearby Word: hobbyist

Magnum opus noun - Something (as a work of art) that is a great achievement and often its creator's greatest achievement.

Hobby and magnum opus are semantically related. Sometimes you can use "Hobby" instead a noun phrase "Magnum opus".