6-letter words with I as the 1st letter and U as the 5th letter

Keep I in the opening spot and U in the fifth, and just 13 tournament-dictionary words fit. Collins includes all 13; ENABLE and NWL2023 each include 11. Only one entry is common, so this pattern is a tight clue, but several answers will be unfamiliar in everyday play.

How many 6-letter words have I first and U fifth?

• There are 13 six-letter matches with I first and U fifth.
• INFLUX is the top scorer at 16 points.
• IMBRUE and IAMBUs tie for the next-highest score, with 10 points each.
• Five words end in M; three end in L and two end in S.
• Only one of the 13 matches is common.

Why is this letter pattern so narrow?

The fixed I and U positions leave only four open slots, yet this pattern has 13 matches. Compare that with the six-letter I…S pattern, which has 27. The seven-letter I…U pattern has 21, despite requiring an extra letter.

The endings are especially lopsided: M closes five words, while L appears three times and S twice. E, R, and X each finish one. If your clue reveals a final M, that narrows the options more than a final L or S.

Which of these words scores highest?

INFLUX leads at 16 points, well clear of IMBRUE and IAMBUs at 10 apiece. The unusual X gives INFLUX its scoring edge; the pattern’s other high scorers do not come close to that total. Across all 13 matches the average score is 9.1 points, so the leading word sits well above the typical option.

There is a trade-off: only one match is common, and eight have definitions recorded. Treat the less familiar entries as dictionary-dependent plays, and check your game’s word list before committing an obscure answer. For a quick shortlist, start with INFLUX, then consider the two 10-point options.