stalwart in WordNet English dictionary

1. having rugged physical strength; inured to fatigue or hardships
   "hardy explorers of northern Canada"; "proud of her tall stalwart son"; "stout seamen"; "sturdy young athletes"
   hardy  stalwart  stout  sturdy 
   
2. used especially of persons
   "a stalwart knight"; "a stouthearted fellow who had an active career in the army"
   stalwart  stouthearted 
   
3. dependable
   "the stalwart citizens at Lexington"; "a stalwart supporter of the UN"; "stout hearts"
   stalwart  stout 
   

1. a person who is loyal to their allegiance (especially in times of revolt)
   loyalist  stalwart