typedef struct TreeOfWords{
         char* s;


    }TreeOfWords;

void InsertWord(TreeOfWords*** words, char *s, int *countOfItems) {

TreeOfWords *p = (TreeOfWords*)malloc(sizeof(TreeOfWords));
p->s = (char*)malloc(strlen(s)+1);
strcpy(p->s, s);

*words = (TreeOfWords**)realloc(words, (*countOfItems+1)*(sizeof(TreeOfWords*))); //Erroe occurs here
(*words)[(*countOfItems)] = p;

}

int main()
{
int count = 0;
TreeOfWords** words = NULL;
char* pch = 'hello'; // actually i am using here while loop and many strings, but here will be just one word
InsertWord(&words, pch, 0);

*words = realloc(words, (*countOfItems+1)*(sizeof(TreeOfWords*)));