a similarity in some aspects

agreement, similarity

a scientific instrument used for measuring mass (weight)

equilibrium

writing letters; letters

agreement

the state of being equal

similarity, balance; egalitarianism

the condition of being like

correspondence in appearance; something that corresponds

an average or normal amount, degree, value etc

average, equilibrium

the state of being equal

equality, balance

(beauty resulting from) the exact shape, design, of opposite parts; the quality of harmony or balance (in size, design etc) between different things

proportion

giving a satisfactory or rewarding return for; good enough for; having property to the value of; of value, equal to

value, estimation associated with something