Commissioned naval officer and Lieutenant JG

Commissioned naval officer noun - A commissioned officer in the navy.

Lieutenant JG and commissioned naval officer are semantically related. In some cases you can replace phrase "Lieutenant JG" with "Commissioned naval officer", this phrases are similar.

Lieutenant JG noun - An officer holding a commissioned rank in the United States Navy or United States Coast Guard; below lieutenant and above ensign.

Commissioned naval officer and lieutenant JG are semantically related. You can use "Commissioned naval officer" instead a noun phrase "Lieutenant JG".