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 test.

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

"The cost of all the equipment needed to perform the tests is around $250,000, but each test would cost only $350 to $550."

testa   

tested    testes    testing    tests   

submit    take    attempt    endeavor    effort    endeavour    try    be    cover    covering   

teichmann' s test    acetylation test    böttger's sugar test    ehrlich's test    warren' s sulphur-chlorid test    blavier' s test    loop test    catoptric test    gmelin' s test    test case   

attest    protest    contest    detest   

examination    exam   

criterion    standard    experiment    proof    experience    trial    touchstone    judgment    distinction    discrimination   

Best    Blessed    Brest    Celeste    Este    Midwest    Pest    West    abreast    acquiesced   

Education    Voices   

data    analysis    control    requirement    train    standard    level    problem