over vs ended

over is a noun but ended is not a noun.

Word	Noun	Adjective	Verb	Adverb
over	Yes	Yes	No	Yes
ended	No	Yes	No	No

As adjectives, over and ended are synonyms defined as:

Other synonyms of over include all over, complete, concluded, terminated.

over (noun)	ended (noun)
(cricket) the division of play during which six balls are bowled at the batsman by one player from the other team from the same end of the pitch

over (adjective)	ended (adjective)
having come or been brought to a conclusion	having come or been brought to a conclusion

over (adverb)	ended (adverb)
throughout a period of time
at or to a point across intervening space etc.
throughout an area
beyond the top or upper surface or edge; forward from an upright position
over the entire area