A greeklish wordlist containing various permutations. You can download it here : https://github.com/iam1980/greeklish-wordlist/raw/master/gr_wordlist.txt
The python script is provided as is, small modifications to George Notaras original work.
Ideally the following rules need to be implemented:
Rule 1
Find: αυ*|*ευ*|*ηυ*|*ου*|*Αυ*|*Ευ*|*Ηυ*|*Ου*|*ΑΥ*|*ΕΥ*|*ΗΥ*|*ΟΥ
Replace: au*|*eu*|*hu*|*ou*|*Au*|*Eu*|*Hu*|*Ou*|*AU*|*EU*|*HU*|*OU
Rule 2
Find: γγ*|*γξ*|*γκ*|*γχ*|*μπ*|*ντ*|*Γγ*|*Γξ*|*Γκ*|*Γχ*|*Μπ*|*Ντ*|*ΓΓ*|*ΓΞ*|*ΓΚ*|*ΓΧ*|*ΜΠ*|*ΝΤ
Replace: ng*|*nx*|*gk*|*nch*|*mb*|*nt*|*Ng*|*Nx*|*Gk*|*Nch*|*Mb*|*Nt*|*NG*|*NX*|*GK*|*NCH*|*MB*|*NT
Rule 3
Find: αύ*|*εύ*|*ηύ*|*ού*|*Αύ*|*Εύ*|*Ηύ*|*Ού
Replace: av*|*ev*|*iv*|*ou*|*Av*|*Ev*|*Iv*|*Ou
Rule 4
Find: α*|*β*|*γ*|*δ*|*ε*|*ζ*|*η*|*θ*|*ι*|*κ*|*λ*|*μ*|*ν*|*ξ*|*ο*|*π*|*ρ*|*σ*|*ς*|*τ*|*υ*|*φ*|*χ*|*ψ*|*ω
Replace: a*|*v*|*g*|*d*|*e*|*z*|*i*|*th*|*i*|*k*|*l*|*m*|*n*|*x*|*o*|*p*|*r*|*s*|*s*|*t*|*y*|*f*|*ch*|*ps*|*o
Rule 5
Find: Α*|*Β*|*Γ*|*Δ*|*Ε*|*Ζ*|*Η*|*Θ*|*Ι*|*Κ*|*Λ*|*Μ*|*Ν*|*Ξ*|*Ο*|*Π*|*Ρ*|*Σ*|*Τ*|*Υ*|*Φ*|*Χ*|*Ψ*|*Ω
Replace: A*|*V*|*G*|*D*|*E*|*Z*|*I*|*TH*|*I*|*K*|*L*|*M*|*N*|*X*|*O*|*P*|*R*|*S*|*T*|*Y*|*F*|*CH*|*PS*|*O
Rule 6
Find: ά*|*έ*|*ή*|*ί*|*ό*|*ώ*|*ύ*|*Ά*|*Έ*|*Ή*|*Ί*|*Ό*|*Ώ*|*Ύ
Replace: a*|*e*|*i*|*i*|*o*|*o*|*y*|*A*|*E*|*I*|*I*|*O*|*O*|*Y
Rule 7
Find: ϊ*|*Ϊ*|*ΐ*|*΄*|*‘
Replace: i*|*I*|*i*|*'*|*'