Second-rater and Second fiddle

Second-rater noun - A person of second-rate ability or value.

Second fiddle and second-rater are semantically related. in sidekick topic. In some cases you can use "Second fiddle" instead a noun phrase "Second-rater".

Second fiddle noun - A secondary role or function.

Second-rater and second fiddle are semantically related. You can use "Second-rater" instead a noun phrase "Second fiddle".