C - issues with sizeof (featuring strtok) - c

Question

Edit: I later discovered this issue mainly stemmed from my confusion with sizeof , and replacing it with strlen was pretty much my solution. My answer (scroll down) presents a decent but simple example of strtok if you're interested as well.
So I've been trying to get a program working where I input a list of words separated by commas, and it subsequently outputs those words, line by line, and removing any spaces.
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define delim ","
int main() {
//variable declaration:
char words[100];
char *word;
char tempWord[100];
int n;
//gets input assinged to "words":
puts("\nEnter a list of words separated by commas.\n");
fgets(words, sizeof(words), stdin);
//sets up the first word in strtok
word = strtok(words, delim);
//loops so long as the word isn't null (reaching the last word)
while (word != NULL) {
puts("\n");
//checks if each character in the word is a space (and ignores them if they are)
for (n = 0; n < sizeof(word); ++n) {
//for some reason can't directly use word (probably because it's a pointer)
//so have to copy it to a temporary value
strcpy(tempWord, word);
//don't print if it's a space
if (!isspace(tempWord[n])) printf("%c", tempWord[n]);
}
//moves to next word
word = strtok(NULL, delim);
}
return(0);
}
by inputting "LETS, FREAKINGG, GOOOOOOOOOOOO", I seem to encounter an issue:
(running the program):
Enter a list of words separated by commas.
(input) >>>LETS, FREAKINGG, GOOOOOOOOOOOO
LETS
FREAKIN
GOOOOOO
It seems depending on the size of the first word, it sets an character limit to be no more than 3 beyond that for subsequent words. Can anyone explain why this is happening?

Answer 1

Thank you #rici and #kaylum for the responses!
For some reason I was getting some errors before when not copying the word to a temporary variable, I'm not entirely sure what I was thinking by putting it inside of the for-loop but it works without! Just a very small brain moment...
I believe my confusion was around sizeof(), and replacing with strlen() is a complete fix for this!
Here's the amended (working) code:
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define delim ","
int main() {
//variable declaration:
char words[100];
char *word;
int n;
//gets input assinged to "words":
puts("\nEnter a list of words separated by commas.\n");
fgets(words, sizeof(words), stdin);
//sets up the first word in strtok
word = strtok(words, delim);
//loops so long as the word isn't null (reaching the last word)
while (word != NULL) {
puts("\n");
//checks if each character in the word is a space (and ignores them if they are)
for (n = 0; n < strlen(word); ++n) {
//don't print if it's a space
if (!isspace(word[n])) printf("%c", word[n]);
}
//moves to next word
word = strtok(NULL, delim);
}
return(0);
}
and the output:
Enter a list of words separated by commas.
(input) >>>LETS, FREAKINGG, GOOOOOOOOOOOO
LETS
FREAKINGG
GOOOOOOOOOOOO
Thank you very much for the help!