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Synonyms for Reinforced (same or very similar meaning)

WordNet sense 1 (given added strength or support):
strengthened

WordNet sense 2 (having strength or power greater than average or expected):
strong

WordNet sense 3 ((used of soaps or cleaning agents) having a substance (an abrasive or filler) added to increase effectiveness):
built

WordNet sense 4 (made more desirable or valuable or profitable; especially made ready for use or marketing):
improved


From the ODE community, based on WordNetadd/edit