Open English Wordnet
Nouns
(n)alphathe 1st letter of the Greek alphabet (n)alphathe beginning of a series or sequence“the Alpha and Omega, the first and the last, the beginning and the end” (The Bible, Revelations 22:13) Adjectives
(s)alphafirst in order of importance“the alpha male in the group of chimpanzees”,
“the alpha star in a constellation is the brightest or main star” (s)alphaearly testing stage of a software or hardware product“alpha version”