Hi,
I'm Joon. i just sent a friend request to you.
Seeing your questions, your Korean skill is really exellent.
As for your questions, I can reply like followings.
1. 거의 같은 말, Almost similar words
물같은 액체가 가득차서 넘칠것 같은 상황을 묘사. 출렁출렁이 찰랑찰랑보다는 좀 더 큰 느낌.
All of them is describing that fluid like water is fully filled in a cup and likely to overflow. 출렁출렁 gives much stronger feeling than 찰랑찰랑.
2. 모두다 매운 맛. All of them is the meaning of spicy.
그러나 '알알하다, 얼근하다, 알짝지근하다, 얼근달근하다, 알큰하다'는 다음과 같이 바꾸어야 맞는 표현. But '알알하다, 얼근하다, 알짝지근하다, 얼근달근하다, 알큰하다' should be changed into following to be right.
얼근하다 -> 얼큰하다
알짝지근하다: it's wrong expression. 틀린 표현
얼근달근하다: it's wrong expression. 틀린 표현
알큰하다 -> 얼큰하다