Niche is not a German word. It is derived from the French word niche (recess), which in turn comes from the Latin nidus, meaning nest.
The word means:
a shallow recess, especially one in a wall to display an ornament.
a comfortable or suitable position in life.
a specialized but profitable corner of the market.
Ecology a role taken by a type of organism within its community.
It means "not awful" in german!!
a role
eine Nische zu schnitzen is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
"Glittervorsp" is not a standard German word, and it doesn't have a known meaning in the language. It might be a misspelling or a made-up word.
Plick is not a German word.
greave is not a German word.
But isn't a German word.
Rouse is not a German word
a living organism's role in an ecosystem
"houpacker" means nothing in German; it is not a German word.
Oxded is not a German word
That word is not German, sorry.