This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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verb-intransitive. To act on each other: "More than a dozen variable factors could interact, with their permutations running into the thousands” ( Tom Clancy).

n. A short act or piece between others, as in a play; an interlude; hence, intermediate employment or time.

v. To act upon each other; as, two agents mutually interact.

n. A short act or piece between others, as in a play; an interlude; hence, intermediate employment or time.

verb-intransitive. To act upon each other.

n. In the drama, the interval between two acts, or a short piece between others; an interlude; hence, any intermediate employment or time.

To act reciprocally; act on each other.

v. act together or towards others or with others

"As with trial testimony, job interviews, and blind dates, seeing people interact is the only way to understand what is going on."

interacted    interacting    interactional    interactively    interacts   

act    move   

relate    do by    handle    connect    have    patronise    foregather    socialize    womanise    intercommunicate   

interlude    interplay    engage    mesh    reciprocate   

abstract    act    attacked    attract    backed    blacked    compact    contract    counterattacked    cracked   

submicron    ribosome-inactivating    monodisperse    smoaky    igniting    hadronic    superluminal    submicroscopic    vidrion    nucleosome