interaction

• POS: Noun
• HYPHEN: in=ter=ac=tion

CIDE DICTIONARY

interaction, n. 

•  Intermediate action.  [1913 Webster]
•  Mutual or reciprocal action or influence; as, the interaction of the heart and lungs on each other.  [1913 Webster]
•  The effect, such as exertion of a force, that one object exerts on another, especially the capture or emission of a particle.  [PJC]
•  Communication between people, or the actions of people that affect others.  [PJC]

OXFORD DICTIONARY

interaction, n.
1 reciprocal action or influence.
2 Physics the action of atomic and subatomic particles on each other.

THESAURUS

interaction

ESP, alternation, answer, coaction, commerce, communication, communion, complementary distribution, concurrence, congress, connection, contact, conversation, converse, cooperation, correspondence, dealing, dealings, engagement, exchange, information, interchange, intercommunication, intercommunion, intercourse, interlacing, intermeshing, interplay, intertwining, interweaving, interworking, linguistic intercourse, mesh, meshing, message, quid pro quo, reply, response, seesaw, social intercourse, speaking, speech, speech circuit, speech situation, talking, telepathy, tit for tat, touch, traffic, truck, two-way communication

ROGET THESAURUS

interaction

Agency

N agency, operation, force, working, strain, function, office, maintenance, exercise, work, swing, play, interworking, interaction, procurement, causation, instrumentality, influence, action, modus operandi, quickening power, maintaining power, sustaining power, home stroke, operative, efficient, efficacious, practical, effectual, at work, on foot, acting, in operation, in force, in action, in play, in exercise, acted upon, wrought upon, by the agency of through, by means of, I myself must mix with action lest I wither by des.