Agent and Tester

Agent noun - Something used to achieve an end.

Tester and agent are semantically related In some cases you can use "Tester" instead a noun "Agent".

Nearby Words: agency, agential

Tester noun - Someone who administers a test to determine your qualifications.

Agent and tester are semantically related in questioner topic. Sometimes you can use "Agent" instead a noun "Tester", if it concerns topics such as person who checks thoroughly.

Nearby Words: test, testing, tested, testable