6-letter words with I as the 2nd letter and D as the 4th letter

The shape _I_D_ leaves four slots free, and the D often turns up twice: MIDDLE, RIDDEN, BIDDER and FIDDLE all double it. W and M are the busiest openings, with 14 and 13 matches between them, and 23 of the 104 words are common enough for everyday writing. Only a few score above 13 points, and those need a Q or a pair of Ks.

What does the _I_D_ shape deliver?

• 104 six-letter matches carry I in the second slot and D in the fourth.
• 37 repeat the D in the third slot, as MIDDLE, HIDDEN and FIDDLE do.
• W opens 14 matches and M opens 13, so those two letters cover 27.
• 23 matches are common words, and 80 have a dictionary definition.
• DIKDIK and QINDAR tie at the top on 16 points each.

6-letter words with I as the 2nd letter and D as the 4th letter

Changing the second letter reshapes this set quickly. A in that slot gives 176 matches, O gives 169, E gives 126 and U gives 91, all ahead of the 104 you get with I. The D in fourth place is the steadier constraint: I with a fourth-slot E runs to 222 words, and I with T reaches 187.

Nothing in the group is exotic. MIDDLE, WINDOW, WISDOM, TINDER, RIDDLE, KINDLE, HINDER and BINDER are all everyday words, which is why nearly a quarter of the list lands in the common tier.

Why do so many matches repeat the D?

A D in the fourth slot pulls a second D into the third slot far more often than chance allows. That happens in 37 of the 104 matches, just over a third, and the result is a compact block of words built around -IDD-: MIDDLE, RIDDLE, FIDDLE, HIDDEN, RIDDEN, BIDDER, KIDDED and PIDDLY.

The -LE ending is the strongest sub-group of all, with 13 matches, and eight of those end in -DLE: DIDDLE, FIDDLE, MIDDLE, PIDDLE, RIDDLE, WIDDLE, KIDDLE and TIDDLE. The other five are BINDLE, DINDLE, KINDLE, WINDLE and GIRDLE.

Points need a Q, a K or a J