"concerted" in the verb sense
1. concert
contrive (a plan) by mutual agreement
2. concert
settle by agreement
"concert one's differences"
"concerted" in the adjective sense
1. concerted, conjunct, conjunctive, cooperative
involving the joint activity of two or more
"concerted action"
"the conjunct influence of fire and strong wind"
"the conjunctive focus of political opposition"
"a cooperative effort"
"a united effort"
"joint military activities"
Source: WordNet® (An amazing lexical database of English)
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