Solution for #1

TWENTY NINE.

Solution for #2

Alternate Solution #1

Herb. (American English only)

Alternate Solution #2

Job.

Alternate Solution #3

Nice.

Alternate Solution #4

Polish.

Alternate Solution #5

Differently.

Solution for #3

"That that is, is; that that is not, is not. Is not that it? It is."

Solution for #4

"Herein." The words it contains are: "he," "her," "here," "ere," "re," "rein," "I," and "in."