to help /help/ /help/
to help out /hɛlp aʊt/ /hɛlp aʊt/
to aid /eɪd/ /eɪd/
lend someone a hand /lɛnd ˈsʌmˌwʌn ə hænd/ /lɛnd ˈsʌmwʌn ə hænd/
to assist /əˈsɪst/ /əˈsɪst/