7-letter words with U as the 2nd letter and B as the 4th letter

Look at the middle of the pattern: ?U?B???. A third-letter M gives you the UMB cluster, and a double B gives you UBB. Those two shapes, plus a block of OUTB- words, explain a large part of the list.

Key numbers for the ?U?B??? set

• Collins takes 165 words, NWL2023 takes 146 and ENABLE takes 128.
• Ten words are common, among them HUSBAND, NUMBERS, RUBBISH and TURBINE.
• The average score is 12.7, with HUMBUZZ highest at 32.
• Final S is the big one at 67 words, with D at 18 and G and R at 14 each.
• Openers are led by B with 28 words, then T with 21 and S with 17.

Why is M the commonest third letter?

M is the third letter of 52 of the 173 words, about three in ten, because UMB is a natural English cluster. HUMBLED, FUMBLED, TUMBLED, MUMBLED and JUMBLED all use it, and so do NUMBERS, DUMBEST and the plural BUMBLES.

B comes second with 44 words, mostly UBB spellings such as RUBBISH, BUBBLES, RUBBING and DUBBING. R follows with 23, which brings in TURBINE and CURBING.

What are the OUTB, TURB and SUNB openings?

OUTB- has 13 words, TURB- has 10, SUNB- has 10 and RUBB- has 9. OUTBACK and SUNBURN belong to the first and third groups, and TURBINE belongs to the second.

Together those four stems cover 42 of the 173 words, so spotting a prefix first saves a lot of time.

Which words score best, and where do dictionaries disagree?

HUMBUZZ scores 32 on two Zs, but it is Collins-only. JUMBUCK reaches 24 and is valid everywhere, and BUMBAZE scores 22 in Collins alone.

QUIBBLE and BUYBACK both score 20 and pass in every list. Collins has 165 of the words against 146 for NWL2023, so the Collins-only entries cluster among rarer words like HUMBUZZ and QUIBLIN.