No. "Counterintuitive" is a relatively new word, entering the language late in the last Century, and meaning "against normal expectations," or " not what you'd think, based on experience." In contrast, "contradictory" means "putting the lie to" or "saying the opposite of." They are not synonymous.
adverse, against, antagonistic, anti, antipodal, antipodean, antithetical, conflicting, contradictory, contrary, contrasting, converse, diametric, hindering, impeding, obstructive, obverse, opposed, polar, reverse
No, "counterintuitive" does not have a hyphen. It is a single, unhyphenated word used to describe something that goes against what one would intuitively expect.
Similar means closely related and contradictory means opposite.
Contradictory means in opposition. The two of them gave me contradictory information and I didn't know what to do.
synonymize
word for word
It was counter-intuitive for me to jump off the bridge, but I did it anyway.
conflicting
The antonym of the word 'synonym' is 'antonym'.
"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.
Of persons: froward [sic], contrary, oppositional. Of ideas: contrary, opposed, opposite, antithetical
"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.