| innate(adjective, characteristic, body, start, reasonable) |
| intrinsic(adjective, characteristic, close, start, natural) |
| inborn(adjective, characteristic, start, reasonable, common) |
| ingrained(adjective, characteristic, start, natural, individual) |
| natural(adjective, start, normal, basic, everyday) |
| congenital(adjective, characteristic, start, reasonable, common) |
| organic(adjective, natural, basic, vital, live) |
| essential(adjective, characteristic, body, reasonable, material) |
| native(adjective, characteristic, start, reasonable, common) |
| inbred(adjective, characteristic, start, natural, individual) |
| constitutional(adjective, characteristic, close, body, start) |
| intuitive(adjective, natural, mental, instinctive, automatic) |
| internal(adjective, characteristic, close, heart, essential) |
| visceral(adjective, natural, heart, secret, private) |
| fundamental(adjective, natural, essential, basic, innate) |
| deep-seated(adjective, characteristic, natural, fixed, essential) |
| indigenous(adjective, start, natural, basic, be) |
| habitual(adjective, inside, instinctive, automatic, intuitive) |
| rooted(adjective, inside, instinctive, interior, automatic) |
| instinctual(adjective, inside, instinctive, interior, automatic) |