Where have you seen the word "homoner"? Every question should (<- please click) have a source and a context and a sentence where the word is used.
(The word has an entry in the urban dicitionary but it is not a standard English word)
Homopolymers are polymers which are a result of polymerisation between the same compounds. For example Polythene or Poly-ethylene or (CH2CH-)n– is a homopolymer.
Homomers do not belong to polymerisation. Rather they belong to isomerism. There are times when same compound is represented in two different forms that might lead to believing that the representations are of two different compounds; these two different representations are called homomers.