-arian +
(Latin: a suffix forming adjectives from nouns ending in -ary; a person who, a thing that; a person who is a part of something, pertaining to one's state or condition; a person who has a connection with or belief in the stated subject; an advocate of something; a native or inhabitant of someplace; someone of a certain age)
piscitarian
A fish monger or one who sells fish.
planetarian
1. Belonging to or connected with a planet or planets; planetary.
2. An astrologer.
3. An inhabitant of a planet.
platitudinarian
Someone who habitually uses platitudes or a flat, dull, or trite remark; especially, one that is uttered as if it were fresh or profound; a cliché.
pornogenarian
Morally "dirty" (sexually vulgar) old people.
pornoseptuagenarian
A prostitute who is in the age range of 70 to 79 years old.
postmillenarian
Someone, or those, who believe that Jesus Christ will return after, and not at or before, the millennium; which refers to the belief that Jesus will return to earth and conduct God's final judgment.
This was the near universal belief system of Protestants during the 17th and 18th centuries. It has since been replaced by Pre-millennialism among many conservative Christians.
predestinarian, predestinarianism
1. Someone who believes or maintains the theological doctrine of predestination, especially in an extreme form; a fatalist.
2. In theology, anyone who believes God has determined all events in advance; especially, the doctrine (usually associated with Calvin) that God has foreordained every event throughout eternity including the final salvation of mankind.
proletarian
1. Of or pertaining to the lowest class of the people.
2. Of or pertaining to the proletariat in the modern sense; such as, the proletarian revolution or the stage of political development predicted by Karl Marx when he said the proletarians would overthrow capitalism.
3. A member of the poorest class of a community; especially, one who is without capital or regular employment; one of the proletariat.
quadragenarian, quadragenarious
A person who is forty years old or forty to forty-nine years old.
quinquagenarian
A person who is fifty years old or fifty to fifty-nine years of age.
quinquennarian
Someone who is five years old.
ranarian
Frog-like; froggy.
riparian
1. Relating to, or located, on the banks of a river or stream.
2. Situated, or taking place, along or near the bank of a river.
rosarian
One who is interested in the cultivation of roses; especially, an amateur rose-grower.
Rotarian
Of, pertaining to, or characteristic of the Rotary organization, a Rotary Club, or Rotarians.