Expertly is a word that describes a person or thing that is skilled, experienced, and knowledgeable about something. Some synonyms for expertly are skillfully, proficiently, adeptly, masterfully, and competently. Skillfully refers to doing something with great proficiency or skill, while proficiently means having the ability to do something with ease. Adeptly is a term used to describe a person who is naturally gifted or skilled at something, while masterfully refers to doing something with exceptional skill or talent. Lastly, competently means having the required or necessary skill or knowledge to do something. All these synonyms can be used interchangeably with expertly.