Here's what rhymes with breastfeeding.

Consider these alternatives

lactation / operation prenatal / fatal mothers / others prematurity / security babies / rabies breast / best intercourse / course feeding / leading supplementation / operation postpartum / carbon menstruation / relation reproductive / productive immunization / information circumcision / given procreation / relation insemination / information unborn / born wedlock / deadlock vegetarianism / millenarianism vaccination / information