The words "broker" and "dealer" are synonyms. They are used to refer to people who negotiate sales or deals. The other words do not share this meaning.

"Sleuth" and "detective" are synonyms. An "entrepreneur" is a businessperson. A "vagabond" is someone who wanders without a fixed home. A "soldier" fights in an army, and a "criminal" commits illegal acts.

A "vagabond" is someone who wanders restlessly or aimlessly. A "medic" is someone who provides medical care, often in battles or emergency situations. An "interpreter" is someone who translates languages for people. An "outlaw" is a criminal, someone who must live outside of society because he/she is on the run from the law.

A "mercenary" is a hired soldier, a person who fights for pay. "Vendor" is a synonym for "salesperson," someone who sells something. Just as you would guess, a "writer" writes and an "actor" acts.

A "tyro" is a novice. An "artisan" is a craftsperson, similar to but distinct from an "artist." An "entrepreneur" is a businessperson. A "wraith" is a ghost or phantom. A "fool" is someone silly or ignorant.

An "itinerant" is someone who wanders and drifts without a fixed home; a vagabond or homeless person. A "recipient" is someone who receives something from someone else. A "witness" is someone who sees an event (usually an accident or crime). "Host" and "guest" are antonyms.

A "donor" or "benefactor" is someone who gives or donates, either to a particular person or to a particular group or cause. This is the opposite of a "recipient," someone who receives a gift from someone else. A "smith" is someone who works with metal (such as a blacksmith). An "immigrant" is someone who moves to another country, and an "artisan" is a craftsperson.

A "neophyte" is a novice or a beginner. The antonym for "neophyte" is expert. Both "pastor" and "cleric" are terms for someone who holds a religious office, such as a minister or a bishop. A "mercenary" is a soldier-for-hire.

"Wraith" is a synonym for ghost, phantom, or specter. "Detective" is a synonym for "sleuth," and "pastor" is a synonym for minister or priest. A "dunce" is a dullard or imbecile. A "curate" is an assistant clergyman or vicar.

Note that "freshmen," "sophomore," and "senior" are somewhat related in meaning in so far as their use to refer to someone in high school with a particular level of education. "Senior" may seem to be related to these words, but in this case the noun has a very different meaning, referring to someone who is old in age: consider the phrase senior citizen or "pensioner." "Pensioner" is closest in meaning to senior. "Child" and "infant" are clearly related but do not come close in meaning to pensioner.