Periodic Covering of the Moon or the Sun

Puzzle 19 of Same Letter at Both Ends Easy Pack

Question is: Periodic Covering of the Moon or the Sun

and the answer is: ECLIPSE

Word Meaning:

ECLIPSE — (astronomy) An alignment of astronomical objects whereby one object comes between the observer (or notional observer) and another object, thus obscuring the latter.

Definitions from Wiktionary.

Periodic covering of the moon or the sun Same Letter at Both Ends Answers | CodyCross Solutions