Lesser and Small fry

Lesser adjective - Having not so great importance or rank as another.

Small fry and lesser are semantically related In some cases you can use "Small fry" instead an adjective "Lesser".

Small fry noun - A young person of either sex.

Lesser and small fry are semantically related in unimportant topic. Sometimes you can use "Lesser" instead an adjective phrase "Small fry", if it concerns topics such as insignificant, tiny, subordinate, minor.