The word "recreantly" means to act in a cowardly or treacherous way. There are several synonyms for this word that can be used in its place depending on the context and tone of the sentence. Some synonyms for "recreantly" include: cowardly, traitorous, faithless, disloyal, unfaithful, deceitful, perfidious, false-hearted, craven, and renegade. These words all convey a sense of betrayal or lack of courage. It is important to choose the appropriate synonym based on the intended meaning and context of the sentence.