The phrase "owing it to" can be substituted with a variety of synonyms in order to convey the same meaning. Words like "attributed to," "credited to," and "thanks to" can be used. For example, if you wanted to say "I passed the test owing it to my hard work," you could also say "I passed the test thanks to my hard work." Other options include "due to," "as a result of," and "because of." When choosing a synonym, it's important to consider the context and tone of the sentence to ensure that the meaning is conveyed accurately.