Bang, bash, belt, bump, criticize, damn, ping, rap, roast, smash, sock, strike, tap, and whack are synonyms for knock.
overall
Substances would work
I started to knock on the door. I will knock before I open the door.
It depends what kind of cold you are asking about. I would recommend searching a thesaurus: thesaurus.com is a place you could look.
2
Some alternative words to use instead of "he" include: they, it, the person, the individual, one.
you can use or , otherwise, or rather than.
like
traitor
a or an
Some words to use instead of got are Get, Gotten, Getten, have, had!
Was the joke this instead? Knock, Knock! Who's there? Hop. Hop who? Hop, Hop, Away. - The Easter Bunny's gone!
instead of knock on wood, it can be knock on snow!
Instead of the phrase "freaked out", try:stunnedstartledalarmedpanicked
Alternative words to use instead of "fake" could be artificial, counterfeit, synthetic, or imitation.
You could use words like us, we, our, ourselves.
great