Smallest is the superlative adjective for small.
An adjective is used to describe a noun. If something is small, it is merely described as small.
A superlative adjective is the greatest extent of that adjective. In this case, something is not only small, but it is the smallest of all.
Please keep in mind, these forms of adjective should only be used in cases when you are comparing more than 2 objects. It is improper to say "1 thing is smallest than another thing" Smaller is the adjective you would want to describe for two objects. Smallest for 3 or more.
small smaller smallest
Smallest is the superlative.
more briefly and most briefly
briefer, briefest
shortest
exciting
the smallest
comparative - merrier superlative - merriest
comparative = tenderer superlative = tenderest
jollier [comparative] jolliest [superlative]
The comparative is later, and the superlative is latest
comparative=tenser superlative =tensest
briefer, briefest
what is the comparative and superlative of glad
What is the comparative and superlative of Often
comparative - merrier superlative - merriest
The comparative is greater and the superlative is greatest.
comparative - rockier superlative - rockiest
comparative is calmer superlative is calmest
The comparative is higher. The superlative is highest.
lovelier [comparative] loveliest [superlative]
comparative = tenderer superlative = tenderest
The comparative is grumpier and the superlative is grumpiest.
comparative straighter and the superlative the straightest