The nouns for the adjective false are falseness and falsehood.
There is no comparative for true. True is an absolute.
truer
falser
The comparative form of solid is solider
The comparative form of in is inner.
comparative - merrier superlative - merriest
"Shine" is a verb and a noun and, as such, does not have a comparative form. The comparative form of the adjective shiny is shinier.
The comparative form of brown is "browner". The superlative form is "brownest".
The comparative form of dreamy is dreamier
The comparative form of many is more
The comparative form of "softly" is "more softly."
more false falsest
"Truer" is the comparative form of true.
The comparative form of handsome is handsomer
The comparative form of solid is solider
The comparative form of "central" is "more central."
The comparative form of good is better.
The comparative form of full is fuller
The comparative form of sunny is sunnier.
Safer is the comparative form of safe.