Oh, dude, the comparative form of "smoothly" is "more smoothly." It's like when you're trying to slide into a conversation smoothly, but someone else does it more smoothly than you. So yeah, "more smoothly" is the way to go if you want to compare smoothness levels.
Smoothest is the superlative form of the word smooth. The comparative form is smoother.
The word 'smoothly' is the adverb form of the adjective smooth. The noun form for the adjective smooth is smoothness.
smoothest
smoother, smoothest
willing
Most graceful is the superlative form of graceful.
The comparative form of busy is busier.
The comparative form of dreamy is dreamier
The comparative form of friendly is friendlier.
comparative form is cleaner superlative form is cleanest
The comparative form of "central" is "more central."
The comparative form of many is more
The comparative form of "clean" is "cleaner."
The comparative form of friendly is friendlier.
The comparative form of softly is more softly
Wiser is the comparative form; wisest is the superlative.
The comparative form of good is better.