HOMOPHONES are words that sound alike have different meanings have different spellings. 

Example: son ( male child)  sun (star in our solar system).

HOMONYMS are words that sound alike have same/different spellings.
 
​EXAMPLE write (to put on paper) right (rip of torn) 

HOMO

C-P-C
Capitalization-  Means all proper nouns are capital 
Punctuation- Means to use periods, question markes, and exclamation markes  
coherency- Means that the sentence must make sense