Final answer:
The synonyms of 'Suspect' are debatable and disputable. The synonyms of 'Suspectfully' can include skeptically or doubtfully.
Step-by-step explanation:
Synonyms of 'Suspect' include debatable and disputable. Synonyms of 'Suspectfully' are not commonly used in English, but 'Skeptically' or 'Doubtfully' can be used as alternatives.