Translating some of these words isn't as straight-forward as you might think. Language is the medium through which culture is conveyed, and due to this, I've found that one of the hardest things about learning Chinese is changing the way you think. For example, in Eastern Asia the concepts of "spirit", "soul" and "thought" aren't exactly the same as our Western idea of these things (due to religion, cultural differences etc), so they often overlap. That's why, when you look in the dictionary, you often see 6 or 7 different variations for each of these words. You need to gain an intuitive feeling for each of the Chinese variations before you can tell which word is most suitable for each given context. It takes time. Here are my suggestions to help you build up an understanding of the nuances between them: 思想 is thought, thinking, idea 精神 is mind, spirit (as in mind, body and spirit) 心灵 is internal spirit, soul, psyche 灵魂 is spirit, soul, ghost 身体 is body, health 生活 is life 活着 is alive, living, to live Peace and laugh are correct. 信念 is faith, 中心 means centre or core (even as in like a shopping centre). 微笑 is smile, 完 means whole or complete. Good luck!

thought, = 思维 spirit, = 精神 soul , = 灵魂 body, = 身 live (to live life). = 住 / 活 Peace (和平), -- yes laugh (笑), -- yes fath (中心) -- ??? what's "fath"? smile (完) -- no, it's 笑容