T-cell is a type of cell. they can move and work. antibodies are small proteins generated by cell. usually, antibodies binding to something and help immune syst

T-cell is a type of cell. they can move and work. antibodies are small proteins generated by cell. usually, antibodies binding to something and help immune system work. antibiotics are some molecules we can add it into our body and only kill pathogens. so they are different terms. in another way, if the molecules will be used as drug, it probably call antibiotic.