Is it possible to count nouns such as: idea, powder, hair?
Only idea is countable.
Refrigerator/Have/We/Enough/Food/The In.
Give many water.
Give me some water.
Can you say fishes?
False.
Is furniture an uncountable noun?
Yes, it is uncountable even though it refers to several things.
Places/many/this project/Jeff/went to/regarding
Jeff went to many places regarding this project.
Alice has killed much zombies.
Alice has killed many zombies.
Many is normally used with plural nouns.
True.
Use many and much in two different sentences.
Perfect!
Knowledge/has/Lisa/much/about/topic/this.
We bought many things from the shop.
Does the noun advise has a plural?
False.
Use plenty of in a question.
Cool!
Concert/there was/a lot of/people/in.
The white walkers found so many fear in the northerners' eyes.
The white walkers found so much fear in the northerners' eyes.
Can a lot of and lots of be used only with uncountable nouns?
False.