empty /ˈemptɪ/ full /fʊl/
tall /tɔːl/ short /ʃɔːt/
beautiful /ˈbjuːtɪf ə l/   ugly /ˈʌglɪ/
bad / bæd/ good /gʊd/
heavy / ˈhevɪ/   light / laɪt/
thin / θ ɪn / thick / θ ɪk /

Adjectives and their opposite