1.adjectival nouns or quasi-adjectives (keiyodoshi); nouns which may take the genitive case particle 'no'
ecstatic; excited; wild; intoxicating
2.adverb (fukushi); noun or participle which takes the aux. verb suru
painfully (of a headache); stinging
3.adjectival nouns or quasi-adjectives (keiyodoshi)
ice-cold (beer, etc.)
4.adverb (fukushi)
noisily (chirping, barking, etc.)