Are there any counter words that some native Koreans might not know?

Question

as well as 개 – 'things' in general - there are lots of specific counter words in Korean, e.g. > 곡 – pieces of music 명 – people 장 – sheets of paper In most cases, I think using 개 rather than the correct counter would be grammatically incorrect. Are there any/many counter words that are sufficiently obscure that the average adult Korean speaker might not know them? Or do they represent a limited and fairly well-known set?

Answer 1

I have some that pops up,

그루 a counter for trees

덩이 for small chunks

모금 for sips of water

사리 for portions of noodle

송이 for buds of flower heads

술 for size of spoon. like one spoon of something

줄 for numbers of raws/lines

줌 for size of handful volume

and many more ! it would give you a headache :)