Preoccupation and Single-mindedness

Preoccupation noun - Something about which one is constantly thinking or concerned.

Single-mindedness and preoccupation are semantically related In some cases you can use "Single-mindedness" instead a noun "Preoccupation".

Single-mindedness noun - Characterized by one unified purpose.

Preoccupation and single-mindedness are semantically related in mind set on one idea topic. Sometimes you can use "Preoccupation" instead a noun phrase "Single-mindedness".