The term "more hard-featured" suggests a rugged, tough or stern appearance. On the other hand, antonyms for this phrase would indicate a gentler, smoother or more delicate demeanor. Words like soft, feminine, refined or delicate may be used to describe someone who is less hard-featured. Some synonyms to this notion would be charming, elegant, and attractive. Such antonyms can also suggest a kind-hearted or approachable personality, in contrast to the rougher exterior suggested by "more hard-featured." Ultimately, the choice of antonyms will depend on the context of the sentence and the message being conveyed.