喜欢 is a verb .Itmeans 'like'. 欢喜 can be an ajective or adverb.It means happy or joyful.

喜欢 wird als Verb gebraucht: 我喜欢你。 Ich liebe dich. 你喜欢这本书吗？Gefällt dir dieses Buch? 你喜欢喝咖啡吗？Magst du Kaffee trinken? 欢喜 wird als Nomen und Adjektiv gebraucht: 这些变动皆大欢喜。 Diese Änderungen sind sehr beliebt. 他满心充满了欢喜。Freude füllt sein Herz aus.

喜欢：like 欢喜：happy

喜欢=like 欢喜=happy

喜欢 is a verb. the same as "like"; for instance: 我喜欢你！I like you! 欢喜 is a adj./adv./n. equal to the words "happy; joyful; gladness" such as: 1. 满心欢喜 be full of gladness in someone's heart. {It's a noun in this phrase at this time} 2.我喜欢看着你满心欢喜的样子。I like to look at your happy face.{I don't know how to express grammatically, could you tell me in English? Thank you.}{by the way "的"，generally, stand for adj. for example, 快乐的，高兴的，难过的；他快乐的跑着，跳着，唱着找不着调的歌。 难过的时候，男人喜欢唱歌。 } 3. 她充满欢喜地拉着小提琴。 She play the violin with great joy.{"joy" is a noun in this English sentence at this time but it is a adv. in Chinese.}