"I am in struggle" or if i say "i am struggling" struggle is appearing as noun and verb in dictionary so can we use "struggle" in this way as a noun?
Yes, "stroggle" can be used as a noun as well as verb in a sentence. But as clarified by RunBee, you must put an article or a modifier when using as noun. Examples:This a story of my struggle against injustice. I am in astruggle with my destiny.