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N first and C third covers 18 words, and a third of them run NIC.
I leads the box between at about thirty three percent, A at twenty two, and E and U at seventeen each.
NICHE, NICER and NICKS all share their first three letters, and NICHE is the most common word on the page.
NECKS carries the E branch, NACHO and NACRE the A branch, and NOCKS the O branch.
None of them shares much with the NIC family beyond the opening N, so a failed I leaves you starting again rather than narrowing down.
NICHE is the opener and NECKS the follow up, since its K and S are letters the NIC words mostly avoid.
No. NIECE puts I in the second box and E in the third. The C lands fourth.
In the last two boxes. Both sit on the I branch, so a guess on one narrows the other considerably.
Yes, it is the name for mother of pearl. It is uncommon, so it is a guess for the point where NACHO has failed.