Oh, dude, you're really making me work here. So, technically speaking, the comparative form of "massive" is "more massive" and the superlative form is "most massive." But like, who even uses those fancy terms in real life, right? Just say something like "bigger" or "biggest" and call it a day.
The comparative is greater and the superlative is greatest.
"Bit" is a noun and a verb and, as such, does not have a comparative or superlative form.
Comparative - better Superlative - best
comparative straighter and the superlative the straightest
Comparative - cuter Superlative - cutest
comparative : purer superlative : purest
Comparative: older Superlative: oldest
Dative; Early Comparative; Earlier Superlative; Earliest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
comparative - merrier superlative - merriest
Comparative: shallower Superlative: shallowest
The comparative is "stricter" and the superlative is "strictest".
comparative = sadder superlative = saddest
The comparative is greater and the superlative is greatest.
Comparative: Whiter Superlative: Whitest
The comparative is grumpier and the superlative is grumpiest.
Comparative: unrulier Superlative: unruliest