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Seventeen words put C first and C third, which means every one of them repeats the letter C somewhere. The page is small and strange.
They are near anagrams of each other and both sit on this pattern. O takes the second box in seven of the seventeen, A in four and Y in four, so the page is really three small families plus a pair of E entries.
CACAO, CACAS, COCAS, COCOA and COCOS all repeat a whole syllable rather than just the letter. That makes them easy to recognise once you have two letters confirmed, because the shape forces the rest.
CYCLE is the most common word here and CACHE is the next. Neither follows the repeated syllable shape, which is exactly why they are worth guessing first.
CYCAD, CYCAS and CYCLO fill out the Y branch and none is reachable. COCKY and COCKS are the useful entries left in the O branch.
A takes the fourth box in six of the seventeen, more than any other letter, and S closes five. Those are the only two figures here with enough behind them to act on.
Yes, it is the plural of coccus, a spherical bacterium. It puts three Cs in a five letter word, which nothing else here manages.
CACAO is the tree and its bean, COCOA is the processed powder. Both are on this list and they use the same letters in a different order.
Repeating a C inside five letters is rare in English. Seventeen words is everything the language offers with the second C fixed in the third box.