Nouns

(n)loyalist, stalwarta person who is loyal to their allegiance (especially in times of revolt)

Adjectives

(s)hardy, stalwart, stout, sturdyhaving rugged physical strength; inured to fatigue or hardships“hardy explorers of northern Canada”, “proud of her tall stalwart son”, “stout seamen”, “sturdy young athletes”
(s)stalwart, stoutdependable“the stalwart citizens at Lexington”, “a stalwart supporter of the UN”, “stout hearts”
(s)stalwart, stoutheartedused especially of persons“a stalwart knight”, “a stouthearted fellow who had an active career in the army”