When should i use "wether" and when should i use "if? what's the difference?

I want to know the meanings of this words: -Whatsoever -However -Although -Though -Somehow I want to know the meanings and how designate this. Thanks

what is the difference of "like" and "fancy"? the british english use "fancy" as the verb "like", but i don't know what is the difference, if these difference exists.