| dedicated expert(expression, person, skill, subject, expert) |
| single-discipline specialist(expression, person, skill, subject, expert) |
| area specialist(expression, person, skill, subject, expert) |
| dedicated specialist(expression, person, skill, subject, expert) |
| domain expert(expression, person, skill, subject, expert) |
| field expert(expression, person, skill, subject, expert) |
| focused specialist(expression, person, skill, subject, expert) |
| narrow specialist(expression, person, skill, subject, expert) |
| single-skilled expert(expression, person, skill, subject, expert) |
| single-skilled specialist(expression, person, skill, subject, expert) |
| single-subject specialist(expression, person, skill, subject, expert) |
| specialist expert(expression, person, skill, subject, expert) |
| topic expert(expression, person, skill, subject, expert) |
| narrowly focused specialist(expression, person, skill, subject, expert) |
| specialized professional(expression, person, skill, subject, expert) |
| subject matter expert(expression, person, skill, subject, expert) |