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

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n. Plural form of pass.

v. Third-person singular simple present indicative form of pass.

"That's right, answer the question "Why should Viator give YOU backstage passes to the Sydney Opera House?" in 10 words or less, and you could win 2 free backstage passes* for the Sydney Opera House."

to come to pass    to pass upon    to pass (something) upon (some one)   

passed    passes    passing   

throw    licence    permit    license    occasion    juncture    success    flying    flight    ordain   

go    move    change    occur    die    circulate    decide    descend    thrust    cross   

serve    slum    overwinter    sojourn    holiday    while away    soldier    winter    vacation    get through   

vanish    depart    die    occur    happen    come    elapse    circulate    surpass    care   

Alsace    Cass    Glass    Grass    Grasse    Jas    Mass    Mass.    Nass    Ras   

go    move    run    shoot    passage    path    fall    stream    turn    approach