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Only twenty two words carry O second and X third, and just three letters ever follow the X.
E takes it in thirteen of the twenty two, I in five and A in four. Nothing else appears there at all, which makes this one of the tightest fourth boxes on the site.
So once you have O and X placed you are choosing among three letters rather than the whole alphabet. That is a far stronger position than most patterns leave you in.
Most of this group is BOXED, BOXER, BOXES, FOXED, FOXES, COXED, COXES, LOXED, LOXES, POXED and POXES, all built from short verbs. TOXIC and TOXIN come from a different root entirely.
MOXIE, DOXIE and FOXIE fill the I branch alongside them. Between those and the two TOX words, the non verb half of the page is accounted for.
S closes seven of the twenty two and D closes five, with E on four. Those three endings carry nearly the whole group.
Zero of the twenty two repeat a letter, so every entry here uses a different letter in each box.
TOXIC tests the T, I and C, none of which the verb branch uses. BOXES confirms the commonest ending but leaves most of the group live.
Nerve, determination or spirit. It started as an American soft drink brand and became an ordinary word.
The hip joint, or the first segment of an insect leg. COXAE is its plural and COXAL the adjective, and both appear here.