[1] : The Collaborative International Dictionary of English v.0.48

eternally \eter"nally\, adv.
   in an eternal manner.
   1913 webster

         that which is morally good or evil at any time or in
         any case, must be also eternally and unchangeably so.
                                                  --south.
   1913 webster

         where western gales eternally reside.    --addison.
   1913 webster

[2] : WordNet (r) 2.0

eternally
     adv : for a limitless time; "no one can live forever"; "brightly
           beams our father's mercy from his lighthouse evermore"-
           p.p.bliss syn: everlastingly, forever, evermore
see also:
everlastingly forever evermore 

[3] : Moby Thesaurus II by Grady Ward, 1.0

38 moby thesaurus words for "eternally":
   ad infinitum, always, boundlessly, ceaselessly, constantly,
   continually, endlessly, ever, everlastingly, evermore, forever,
   forevermore, illimitably, immeasurably, immensely, in perpetuity,
   incalculably, incessantly, incomprehensibly, indestructibly,
   infinitely, innumerably, interminably, limitlessly, measurelessly,
   never-endingly, perdurably, perennially, permanently, perpetually,
   steadily, time without end, to infinity, unceasingly, unendingly,
   without end, without limit, world without end

Eternally >> E Words
Eternally, definition of term: Eternally
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