No it is an adjective. Superlative adjectives end in -est.
eg heaviest / lightest / widest / slowest.
If the adjective is longer than two syllables then you use most + adjective for the superlative form eg
most beautiful / most interesting / most pliable.
most frightening
Scariest is the superlative form of the adjective scary.
Get is a verb and does not have comparative or superlative degrees.
Sum is a noun and a verb and, as such, does not have a superlative degree.
Teach is a verb and so has no superlative form.
"Poke" is a verb and a noun and, as such, does not have a superlative form.
"Show" is a verb and a noun and, as such, does not have a comparative or superlative form.
"Beg" is a verb and, as such, does not have a comparative or superlative form.
"Contended" is a verb and, as such, does not have a comparative or superlative form.
"Copper" is a noun and a verb and, as such, does not have a comparative or superlative form.
Shape is a noun and a verb and, as such, does not have a comparative or a superlative degree.
"Bulk" is a noun and a verb and, as such, does not have a superlative degree. If that was bulky, it would be bulkiest.