Most often
OFTEN
The superlative form of low is lowest.
Less is already the comparative form of little. The superlative is least.
"Wealthier" is the comparative form of wealthy. The superlative form is wealthiest.
highest
OFTEN
No, the superlative form is "gentlest."
Smoothest is the superlative form of the word smooth. The comparative form is smoother.
The superlative form of genuine is more genuine.
If splendidest was a word, it would be a superlative. The comparative form of splendid is more splendid, the superlative form is most splendid.
the comparative and superlative forms of the word near are nearer(in comparative form) and nearest(in superlative form).
What's the superlative of shine
The superlative form of low is lowest.
Commonest is the superlative of common.
The superlative of bright is brightest.
The comparative form of the word "cheap" is "cheaper." The superlative form is "cheapest."
Mere does not have a comparative form. The superlative form is merest