back vs good

Some examples from the web:

• My back's pretty good actually.
• With both hands tied behind my back.
• Meet me back here after closing.
• The back zone is strengthened, back pains are successfully counteracted.
• My back, my back, my back is still sore.
• She didn't write me back.
• You can't go back there.
• Ernesto will back whatever you decide.
• Lovers torn apart being brought back together...
• Cassandra, go back into me.
• Everybody get back, please! Sheriff department.
• People died because you brought me back.
• Think back, try to remember...
• Well, I'm glad you came back.
• Your people want their canal back.
• The lock's been forced back into position.
• Check the blood bank and report back.
• Impossible. Wiener just got back.
• Not if our troops drive them back.
• Jessica Lynch never planned on shooting back.

Some examples from the web:

• Good, good, good, good.
• I am good, I'm good, good...
• The Commission supports durable urban development through good governance and good urban management.
• Good, good, good, good.
• This... Is a good, good, good man.
• Worldly matters need a good heart not a good mind.
• You're always good at sniffing out a good tequila.
• For no special reason, yesterday's dream was good good.
• A good man and a good soldier.
• And good times are a good idea.
• It's good you think good things.
• The communication is again a good demonstration of these good intentions.
• Johnson, good entry, good command.
• But being back in the office sure felt good, really good.
• Sleep and good food are indispensable to good health.
• The time has come for all good children to say good night.
• My kids had good medical, good schools.
• Please get rid of the misconception that good girls always want good guys.
• Just somebody good that you think would be good.
• You know, a good adventure needs a good ending.