Yieldance is a relatively uncommon word that refers to the act of yielding or giving in. It can also mean a yielding attitude or submissive tendency. However, there are several synonyms that can be used interchangeably with yieldance. Some of these synonyms include submission, compliance, obedience, acquiescence, surrender, and concession. Each of these words conveys the idea of giving in or yielding to another's wishes or demands. Choosing the appropriate synonym would depend on the specific context and the tone desired, as some words such as surrender may connote a more negative or defeated tone.