-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; a promotor of something; a native or inhabitant of someplace; someone of a certain age)

sanguinarian
1. A human who feeds on blood.
2. A reference to someone who believes he or she needs to consume blood to maintain her or his health.
sanitarian
A public health or sanitation expert.
sectarian (adjective)
Relating to religious or political groups and the differences between them: "There are more and more reports about countries being split along sectarian lines and about sectarian violence."
semibarbarian (s) (noun), semibarbarians (pl)
Outdated, someone who is considered to be partially, or half, civilized: Mary and Tom thought that their daughter was a semibarbarian because she was quite mannerly and well-behaved at times, and at other times quite crude, rough, and vulgar.
seminarian
A student at a religious seminary or Jesuit school; a seminarist.
septuagenarian
1. A person who is in his/her seventies.
2. Someone who is seventy to seventy-nine years old.