into
A synonym for "very fast" is quick.
You could try: "interested party."
There isn't a synonym to the word viola. Violins are very similar, but NOT the same so not a synonym.
very bad
fresh
Very Surprised.
A sweltering day.A single synonym for a very hot day would be a scorcher.
A synonym is a word that has an identical or very similar meaning to another word. As freshwaterbiome is not a word it does not have a synonym.
Exhausting.
closely
smalest