"Opportunist" is a word in ENGLISH

One who pleads the cause of another. Specifically: One who pleads the cause of another before a tribunal or judicial …

One who defends, vindicates, or espouses any cause by argument; a pleader; as, an advocate of free trade, an advocate …

one who assists, defends, or pleads for another; one who renders legal advice and aid and pleads the cause of …

In old praotice. one

In the civil law. An advocate; one who managed or asslsted ln managing another’s cause before a judicial tribunal. Called …

An anarch; one who advocates anarchy of aims at the overthrow of civil government.

The missionary who first plants the Christian faith in any part of the world; also, one who initiates any great …

To stand in presence of some authority, tribunal, or superior person, to answer a charge, plead a cause, or the …

One who advocates autonomy.

One who advocates the Brunonian system of medicine.

One who engages in any contest; esp. one who in ancient times contended in single combat in behalf of another's …

One learned in the classics; an advocate for the classics.

One who joins or promotes a coalition; one who advocates coalition.

In the civU law. A ■counsellor, as distinguished from a pleader or advocate. An assistant judge, one who participates in …

One who advocates a constitutional form of government; a constitutionalist.

One who gives advice, especially in legal matters; one professionally engaged in the trial or management of a cause in …

An advocate or professional pleader; one who counted for his client, that is, orally pleaded his cause.

One who advocates the practice of cremation.

One who is an advocate of culture.

One who advocates or encourages defection.