A synonym is a word that means the same, or almost the same. So yes the word absurd could be a synonym form another word or there are synonyms for the word absurd.
A synonym for "classify" is analyze.
A synonym for regularly is common!
A synonym to order is decree
The word 'synonym' is a noun, a word for a word that means the same or nearly the same as another word; a word for a thing.
A synonym for the word 'anxious' is 'worried' or 'nervous'.
I was fraught with worry.
The ocean voyage was fraught with danger.
Life on the sea is fraught with danger.
Her new assignment was fraught with danger.
The road to Boston is fraught with danger, these days.
The word "fraught" can function as either an adjective or a verb, depending on the context in which it is used.
Fraught Distraught
synonymize
"Word for word" is a synonym for verbatim.
"Alternate word" is a noun-phrase that is kind of a synonym for the word "synonym. There is no one exact word that means the same as synonym.
The antonym of the word 'synonym' is 'antonym'.