The superlative of later is "latest."
latest
Latest.
The comparative is later, and the superlative is latest
later, latest
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
most superlative is the superlative form of superlative
superlative of quiet
The comparative is later, and the superlative is latest
latest
latest
Last is the superlative form of late.late /later /last
late, latest
later, latest
later, latest
Comparative: later, superlative: latest
later, latest
current later latest
Later, Last or Latest. Comparative Adjective: Later. Superlative Adjective: Latest.
if I'm correct i think last is the superlative form of a word i think the comparative form is either later or after, but im not sure you'd have to double check on that