The word that features an affix that makes the word a noun is connection.
- "uncreative" includes the prefix "un-" which negates the adjective "creative."
- "computational" has a suffix "-al" that turns "compute" into an adjective.
- "signaled" has the suffix "-ed" which typically forms the past tense of a verb.
"Connection" has the suffix "-tion," which indicates a noun derived from the verb "connect."