Tribal Feature Name Regex

import re

regex = re.compile("^(?P<tribe>.+)\s(?:(?:Indian)\s)?(?P<description>(?:(?:Off-)?Reservation(?:(?:\sTrust\sLand)|(?:\s-\sDisputed Area))?)|(?:Tribal Headquarters))$")

feature_names = [
	"Chehalis Off-Reservation Trust Land",
	"Chehalis Reservation",
	"Colville Off-Reservation Trust Land",
	"Colville Reservation",
	"Cowlitz Indian Tribal Headquarters",
	"Hoh Indian Reservation",
	"Jamestown S'Klallam Off-Reservation Trust Land",
	"Jamestown S'Klallam Reservation",
	"Kalispel Off-Reservation Trust Land",
	"Kalispel Reservation",
	"Lower Elwha Off-Reservation Trust Land",
	"Lower Elwha Reservation",
	"Lummi Reservation",
	"Makah Indian Reservation",
	"Muckleshoot Off-Reservation Trust Land",
	"Muckleshoot Reservation",
	"Nisqually Reservation",
	"Nooksack Off-Reservation Trust Land",
	"Nooksack Reservation",
	"Port Gamble Reservation",
	"Port Madison Reservation",
	"Puyallup Off-Reservation Trust Land",
	"Puyallup Reservation",
	"Quileute Reservation",
	"Quinault Reservation",
	"Samish Indian Nation Tribal Headquarters",
	"Sauk-Suiattle Reservation",
	"Shoalwater Bay Indian Reservation",
	"Shoalwater Bay Off-Reservation Trust Land",
	"Skokomish Reservation",
	"Snoqualmie Reservation",
	"Spokane Off-Reservation Trust Land",
	"Spokane Reservation",
	"Squaxin Island Off-Reservation Trust Land",
	"Squaxin Island Reservation",
	"Stillaguamish Off-Reservation Trust Land",
	"Stillaguamish Reservation",
	"Swinomish Off-Reservation Trust Land",
	"Swinomish Reservation",
	"Tulalip Off-Reservation Trust Land",
	"Tulalip Reservation",
	"Upper Skagit Reservation",
	"Yakama Nation Off-Reservation Trust Land",
	"Yakama Nation Reservation",
	"Yakama Nation Reservation - Disputed Area"
]

tribe_dict = {}

for name in feature_names:
    match = regex.match(name)
    print match.groupdict()

Python Fiddle

Python Cloud IDE