Words Of Agreement

adverb used to emphasize the speaker's belief that what is said is true or likely to happen

• Certainly, the data provided in the report is accurate and reliable.
• I can certainly help you with that assignment, no problem!
• I'll certainly catch you later for some drinks, dude.
• His smile certainly lit up the room, bringing joy to everyone present.

adjective certain or confident without doubt

adverb in a confident or positive manner

• I am sure that the data provided is accurate.
• Sure, I can give you a ride to the party.
• Sure thing, I'll hook you up with some tickets.
• She sure knows how to pull at my heartstrings.