alter / change / vary / switch someone please show me the difference among these words, thanks a lot.

causes of poverty? could somebody give me some causes of poverty? please help me.thanks a lot.

solution, way, method, measure. are these words interchangeable or not? please help me. Thanks a lot.

spectator and audience? please help me distinguish between these words. thank you.

matter, problem, question? hi everyone, please show me the difference of these words (with examples if you can) thanks a lot.

wound, pain, hurt, injury? so many words in english are seemingly similar ( especially its meaning ) but in fact,there always are some differences in its usage, more or less. how intricate english is + +! someone please help me for these words and if possible, please give me the other words easy for people to confuse. Extremely grateful for that. thanks guys a lot.

type, sort, kind? I really don't know when to use TYPE, SORT, KIND, how are they different? please give me some examples. thank guys.

reward and award? please explain to me the difference of these 2 words (structure, usage, meaning). Thank guys much.

plant and grow? "I grow a tree" and "I plant a tree". are they similar or different? thanks.