Choose the perfect synonym or antonym for the word

Observation

/ˌɒbzəˈveɪʃən/

Noticing or watching something carefully to learn about it.

Synonyms:

This word has no antonyms

We're always under C.O.—constant observation.

They conflicted squarely with observation.

It was the first intentional observation of fission west of Copenhagen.

From Latin observatio, from observare meaning to watch over. Entered Middle English via Old French in the late 14th century.

40 mentions per 1 million words

Often

Hint: Frequency according to COCA