| inveterate(adjective, natural, essential, vital, live) |
| natural(adjective, vital, live, living, biological) |
| regular(adjective, natural, essential, vital, live) |
| undeveloped(adjective, rude, natural, raw, crude) |
| characteristic(adjective, essential, constitutional, constitutive, built-in) |
| forlorn(adjective, rude, natural, raw, crude) |
| animate(adjective, natural, vital, live, living) |
| basic(adjective, essential, constitutional, constitutive, built-in) |
| biological(adjective, natural, vital, live, living) |
| biotic(adjective, natural, vital, live, living) |
| blossoming(adjective, growing, maturing, developing, progressing) |
| born(adjective, natural, vital, live, living) |
| built-in(adjective, essential, constitutional, constitutive, hardwired) |
| chemical-free(adjective, natural, vital, live, living) |
| chronic(adjective, natural, vital, live, living) |
| confirmed(adjective, natural, vital, live, living) |
| connate(adjective, natural, vital, live, living) |
| constituent(adjective, organized, ordered, structured, integrated) |
| consummate(adjective, natural, vital, live, living) |
| deep-rooted(adjective, essential, constitutional, constitutive, built-in) |