Nomad.
The term Hopi is a contraction of Hópitu-shínumu,"peacefull all people", the tribe's own name for themselves.
settlement patterns involving long term permanent settlements
2 years
I believe it should be written "Council member". The term "Security Council" is always capitalized, and as Council is just a contraction of that, it should remain capitalized. However, on a quick scan of the UN website, the 'member' is not capitalized. However, "Council Member" is probably acceptable.
Representatives serve two-year terms.
A Yiddish term for "fellow member of the tribe."
A person who travels from place to place to sell goods is called a peddler. This term originated from the Middle English word pedlere.
A nomad travels regularly and has no "regular" home. Gypsies are generally nomads so the term gypsy may be appropriate as well in some cases.
The term Big Man refers to a highly influential member of a tribe in Polynesia and Melanesia. This leader in turn provides his followers with protection and economic assistance.
The general term for what a wave travels through is a medium, but in the case of earthquakes the wave travels through the ground.
A member of the Senate has a term of six years.
The term for a member of the US Senate is 6 yrs. After that, he must stand for reelection.
Speed, instantaneous or not, is a term used for how fast an object travels. Velocity, instantaneous or not, is a term used for how fast an object travels in a particular direction.
2 year term
The original term comes from the American Indian tribe called Dakota.
The medium would be a suitable term.
A light year.