Words from
interstice
    an intervening space, especially a very small one.
    
    Source: My old website
    
    interstitial
    of, forming, or occupying interstices.
    
    Source: My old website
    
    prodigious
    remarkably or impressively great in extent, size, or degree.
    
    Source: My old website
    
    impervious
    unable to be affected by.
    
    Source: My old website
    
    countenance
    a person's face or facial expression.
    
    Source: My old website
    
    exultant
    triumphantly happy.
    
    Source: My old website