use '?' for JOKER (blank)

From letters Z, I, G, G, I, N, G  I made following words

7 letter words

zigging[18]

6 letter words

igging[9]

4 letter words

zing[13]

3 letter words

zig[12], zin[11], gig[5], igg[5], gin[4]

2 letter words

in[2]