There is no 7-letter anagram for NUCKLEI, but there are 6-letter words "nickel", "unlike" and "nuclei".
docket
The letters spell the word calked. They also spell the word lacked.
tock
You can spell tinkle with those letters.
The letters spell the word checkmate. It is a chess word that means a check from which a king cannot escape.
These letters could be rearranged to spell the word 'banker'.
Parakeet
You can spell the following 7 lettered words with the letters 'pevctzrkfhpi':ChipperPitcherThicker
kyoaes
The letters spell the word effects. The word uses all seven letters.
The letters spell teamwork. The letters spell workmate.
The letters IIRIKEO can spell the words I, or, ire, irk, ore, and roe.