Agree

accorder

(grammar: to correspond in gender, number, case, person, etc.)

concorder

(to resemble, coincide, correspond)

consentir

(to be in harmony about an opinion; be in unison or concord; be united)

convenir

(to come to terms or to a common resolve)

être d'accord

(to be in harmony about an opinion; be in unison or concord; be united)