Synonyms for Secondary

Final
collateral coming consequent	contingent derivative eventual	final indirect last	secondary ultimate

Proxy
advocate agency alter ego alternate alternative amicus curiae analogy attorney backup barrister changeling clone comparison copyright	counterfeit deputy Doppelganger duplication equal equivalent ersatz exchange executive officer exponent fake figurehead ghost	imitation lieutenant makeshift metaphor paranymph personnel pinch hitter pleader procurator proxy replacement representative reproduction	reserves ringer second string secondary sub substitute substitution surrogate symbol third string understudy vicar vice

Low
beggarly cheap common degrading demeaning disadvantaged good-for-nothing humble	inferior junior less lesser low lowly minor	modest ordinary second string secondary servile shabby sub	subaltern subject subordinate subservient third string underprivileged vulgar

Twin
ambidextrous bilateral binary bipartisan bipartite double	doubled dual dualistic duplex duplicate	duplicated geminate identical matched paired	secondary similar twin two twofold