Rejection: Word Choice

[WordlessWords]

I am new to C-C and received a rejection, the reason being, word choice. Could anyone provide a little help here as the reason was a bit vague. thx.

[Celeste Stewart]

Here are a few examples of word choice errors:

With plummeting unemployment rates, it's hard to get a job right now.

(unemployment rates are soaring, not plummeting)

Costco has choices abound!
(Costco has choices aplenty!)

The kids played there video games all night.
(their)

[Ed]

Authors must also proofread for homophones.
http://www.merriam-webster.com/dictionary/homophone