Subsidiarily is a word that relates to being subsidiary or secondary in nature. It is often used in legal or business contexts to indicate something that is minor or subordinate to a main entity. Synonyms for this word could include "subsidiarily", "secondarily", "auxiliary", "supporting", "ancillary", "derivative", "dependent", "supplementary", "secondary", and "inferior". Each of these words conveys a similar meaning, but may have slightly different connotations, depending on the context in which they are used. When choosing a synonym for "subsidiarily", it is important to consider the intended meaning and tone of the sentence or passage in which it appears.