return /rɪˈtɜrn/ /rɪˈtɜːn/
profit /ˈprɑːfɪt/ /ˈprɒfɪt/
yield /jiːld/ /jiːld/
output /ˈaʊtpʊt/ /ˈaʊtpʊt/
efficiency /ɪˈfɪʃ.ən.si/ /ɪˈfɪʃnsi/