[c++] C++ -- expected primary-expression before ' '

I am new to C++ and programming, and have run into an error that I cannot figure out. When I try to run the program, I get the following error message:

stringPerm.cpp: In function ‘int main()’:
stringPerm.cpp:12: error: expected primary-expression before ‘word’

I've also tried defining the variables on a separate line before assigning them to the functions, but I end up getting the same error message.

Can anyone offer some advice about this? Thanks in advance!

See code below:

#include <iostream>
#include <string>
using namespace std;

string userInput();
int wordLengthFunction(string word);
int permutation(int wordLength);

int main()
{
    string word = userInput();
    int wordLength = wordLengthFunction(string word);

    cout << word << " has " << permutation(wordLength) << " permutations." << endl;
    
    return 0;
}

string userInput()
{
    string word;

    cout << "Please enter a word: ";
    cin >> word;

    return word;
}

int wordLengthFunction(string word)
{
    int wordLength;

    wordLength = word.length();

    return wordLength;
}

int permutation(int wordLength)
{    
    if (wordLength == 1)
    {
        return wordLength;
    }
    else
    {
        return wordLength * permutation(wordLength - 1);
    }    
}

You should not be repeating the string part when sending parameters.

int wordLength = wordLengthFunction(word); //you do not put string word here.

Change

int wordLength = wordLengthFunction(string word);

to

int wordLength = wordLengthFunction(word);