are co-dominace and hybrid the same thing?

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no, they're not, but they're vaguely related.  A hybrid is someone who has two different alleles for a particular gene.  For example if a RR person is crossed with a rr person, their offspring are "hybrids" who are Rr.  If R is dominant over r, then the hybrid will look just like their RR parent.  Co-dominance describes a condition where someone has two different alleles that show both their effects.  If you had a bull that was RR (red) and a cow that was WW(white), you'll create a hybrid cow who is RW.  If R and W are co-dominant, then that cow will show both allele's effects and be called Roan (has white hairs and red hairs)