Chosen and Unbidden

Chosen adjective - Singled out from a number or group as more to one's liking.

Unbidden and chosen are semantically related In some cases you can use "Unbidden" instead an adjective "Chosen".

Unbidden adjective - Not searched or asked for.

Chosen and unbidden are semantically related in willing topic. Sometimes you can use "Chosen" instead an adjective "Unbidden", if it concerns topics such as voluntary.