7-letter words with O as the 1st letter and I as the 6th letter

The pattern is O _ _ _ _ I _, with the sixth tile fixed and the final tile open. Organic and oceanic show the shape clearly; osmosis and osmotic fit too. Their familiar-looking starts disguise a narrow group: only 2 matches rank among common English words by frequency, and tournament dictionaries do not all accept the same entries.

At a glance: pattern, counts, and top scorer

• All 63 matches begin with O and put I in position six, leaving the seventh letter open.
• Collins includes 63 matches; NWL2023 includes 55, while ENABLE includes 52.
• Final C leads with 18 words, ahead of D with 13.
• Oxyphil scores 22 points; only 2 matches are common by frequency.

How do the endings divide?

The exact frame is O????I?, so check the sixth tile before scanning the final letter. Organic and oceanic both end in C; osmosis ends in S, showing why the last tile makes a useful second filter. Those recognizable examples sit beside specialist entries such as opuntia and oolitic.

C and D together account for 31 of 63 matches, just under half; N and S follow with 7 each. A and T each finish 5 words, while L and X finish only 2 apiece. If your rack already supplies C or D, test those endings first instead of cycling through every possible final tile.

Which matches score well, and where are the gaps?

Oxyphil tops the scoring examples at 22 points, with oxyacid at 20. Overmix and oxyntic each score 19, making X the standout tile in these high totals. For a practical rack search, look for a place to use X before settling for a lower-value ordinary word.

Dictionary coverage is uneven: Collins has all 63 matches, compared with 55 in NWL2023 and 52 in ENABLE. Forty-four have definitions, but only 2 are common by frequency, so many entries are specialist vocabulary. Check your game's word list before committing an unfamiliar form to a premium square.