The phrase "wert in service of" means to serve or work for a particular purpose or cause. Synonyms for this phrase include "serve", "work for", "dedicate oneself to", "commit to", "be devoted to", "be committed to", and "be engaged in". Other words that can be used to express a similar idea include "loyalty", "allegiance", "obedience", "duty", "faithfulness", "sacrifice", "devotion", and "commitment". It is important to choose the appropriate synonym according to the situation as each word carries a slightly different connotation.