Fixed idea and Single-mindedness

Single-mindedness and fixed idea are semantically related in mind set on one idea topic. In some cases you can use "Single-mindedness" instead a noun phrase "Fixed idea".

Single-mindedness noun - Characterized by one unified purpose.

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