natural childbirth

词形变化：

名词: naturalness |

同义词：

normal | true | native | typical | characteristic | genuine | authentic | real | pure | honest | original | legitimate | innate | usual | physical | biological | unaffected | unpretentious | untreated | unprocessed | birth | actual | accustomed | ingenuous | factual | unlawful | inborn | unassuming | customary | earthy | spontaneous | realistic | effortless | unsophisticated | inherent | scientific | scenic | constitutional | artless | organic | easy | born | lifelike | rude | cancel | instinctive | raw | ordinary | regular |

反义词：

unnatural | artificial | sharp | supernatural | flat |