central adjectives
adjectives that can be used as both modifiers and predicatives
peripheral adjectives
adjectives that can only function either as predicatives (never-attributive) or as modifiers (attributive-only)
inflectional comparison
forming the comparative and superlative by adding morpheme suffices -er & -est
analytic comparison
= periphrastic comparison
forming the comparative and superlative by adding the advers more & most