synovial fluid vs synovia

synovial fluid and synovia both are nouns.

Word	Noun	Adjective	Verb	Adverb
synovial fluid	Yes	No	No	No
synovia	Yes	No	No	No

As nouns, synovial fluid and synovia are synonyms defined as:

synovial fluid and synovia: viscid lubricating fluid secreted by the membrane lining joints and tendon sheaths etc.

synovial fluid (noun)	synovia (noun)
viscid lubricating fluid secreted by the membrane lining joints and tendon sheaths etc.	viscid lubricating fluid secreted by the membrane lining joints and tendon sheaths etc.