运气有好运气和坏运气，而幸运专指好运，it's just like the word reputation and fame,fortunate has good raputation and bad raputation,while fame just means good raputation。另外，运气是一个名词，而幸运是一个形容词，比如我们可以说 我的运气很好 和 能够见到国家主席，我很幸运

幸运-运动 These 2 words are not similar! 幸运 means good luck or lucky. 运动 means move/movement or sport 经历-经验 经历 is more like go through. 经验 is more about accumulated experience, to have experience in/with something. 以为-认为. 以为 Generally speaking this carries the idea of 'to have thought wrongly'. So for example, You thought a friend wasn't going to come to a party, but they show up, then you would say 我以为你不想来呢！认为 to be of the opinion. I will leave native speakers to explain the others

运气-幸运 luck-lucky 经历-经验They both mean experience. But the former is a countable noun. e.g.那真是一次有趣的经历啊！That's really an interesting experience! The latter is an uncountable noun. e.g.他在这方面很有经验。He has a lot of experience in this. 技能-能力-才能 technique-ability-talent 避免-避开 “避免”means to prevent (something) bad from happening. "避开” means to avoid of being hit by substantial things. 声响-响声-声音 The three mean the same way. You may use random one of them. I'm a native Chinese.

幸运 GOOD luck, Lucky (noun and adjective) 运气 luck, fortune (noun) 经历 experience(s) (countable noun) 经验 experience (uncountable noun) 技能 skill(s) 能力 ability, capability 才能 talent 避免 avoid 避开 dodge 声响 sound, noise 响声 LOUD sound 声音 ≥ 声响 includes all kinds of sounds 以为=认为

Fortune lucky Go through Experience Skill capability talent Avoid. Keep away from I think 声响&响声 can both be defined as sound ,while 声音 tends to be sound or voice. For its hard to find proper words for以为&认为，I'll just illustrate this through examples. 我以为你不会来了。I thought you wouldn't come! 我认为你不会来了。I think you won't come.