The word "fieldsman" refers to someone who works in a field or is skilled in a particular field. Synonyms for fieldsman include "specialist," "expert," "professional," or "practitioner." Other synonyms might include "adept," "pro," "master," "virtuoso," or "savvy." Additionally, words like "craftsman," "artisan," and "journeyman" might be used for someone who is particularly skilled and experienced in their field. These words all indicate a high degree of proficiency and experience in a particular area of knowledge or work, and can be used interchangeably with fieldsman to describe someone who is skilled or accomplished in a particular field.