7-letter words with I as the 1st letter and D as the 4th letter

All 12 matches fit I _ _ D _ _ _: I starts the word, and D lands in the fourth slot. Collins contains all 12; ENABLE and NWL2023 contain four apiece. None ranks among the common entries, so this pattern is a spelling puzzle rather than a stash of everyday vocabulary.

The pattern and its standouts

• All 12 words have I in position one and D in position four.
• Collins accepts all 12; ENABLE and NWL2023 each accept four.
• IRIDIZE leads the score list at 17; IXODIDS follows at 16.
• IRIDI- starts five matches; ISOD- starts four.
• The set has zero common entries by our frequency measure.

Which letter runs narrow down the matches?

Five words begin IRIDI-: IRIDIUM, IRIDIAN, IRIDIAL, IRIDISE, and IRIDIZE. That repeated run is the strongest visual clue. After fixing I at the start and D at slot four, test I-R-I-D before trying unrelated letter combinations.

Four other matches start ISOD-: ISODICA, ISODOMA, ISODONT, and ISODOSE. The remaining entries are INEDITA, IXODIDS, and IRIDEAL; check the full spellings rather than assuming every IRID- form ends alike.

The contrast with another starting letter is sharp: the seven-letter S-starting pattern with D fourth has 205 matches, compared with 12 for I. Keep D fixed when broadening your search; changing both letters discards the clue's strongest constraint.

Which 7-letter words with I first and D fourth score most?

IRIDIZE scores 17 points, the top value among these entries, while IXODIDS earns 16. The gap is only one point, but both sit well above the set's 9.9 average. If your rack already holds Z, IRIDIZE is the standout scoring candidate; IXODIDS offers the second-highest score.

IRIDIUM, ISODICA and ISODOMA each score 10, followed by several words at eight: IRIDIAN, INEDITA, ISODOSE, IRIDEAL, and IRIDIAL. These are word values before board bonuses, so a premium square can change the comparison. The top score is not a frequency ranking, and the rare spellings make a dictionary check worthwhile.