Here you are a vocabulary wordlist for your FCE on family and relationships. Remember that this list is not closed, you can add other words you consider relevant to this topic, but you can start working with it. You'll also find the phonetic alphabetic transcription to learn the spelling and the pronunciation at the same time.
Nouns
acquaintance /əˈkweɪntəns/
anniversary /ˌænɪˈvɜːsəri/
community /kəˈmjuːnɪti/
couple /ˈkʌpl/
destiny /ˈdestɪni/
engagement /ɪnˈɡeɪdʒmənt/
flatmate /ˈflætmeɪt/
generation /ˌdʒenəˈreɪʃn/
household /ˈhaʊshəʊld/
loyalty /ˈlɔɪəlti/
neighbour /ˈneɪbə/
nephew /ˈnevjuː/
partner /pɑːtnə
relative /ˈrelətɪv/
roots /ruːts/
widow /ˈwɪdəʊ/
Verb phrases
fall in love (with sb) /fɔːlɪn lʌv/
fall out (with sb) /fɔːl aʊt/
get in touch (with sb) /ˈɡet ɪn tʌtʃ/
get on well (with sb) /ˈɡet ɒn wel/
get to know /ˈɡet tə nəʊ/
go out with /ɡəʊ aʊt wɪð/
inherit /ɪnˈherɪt/
keep in touch (with sb) /kiːp ɪn tʌtʃ/
lose touch (with sb) /luːz tʌtʃ/
make friends (with sb) /ˈmeɪk frendz/
make up with sb /meɪk ʌp wɪð/
propose to sb /prəˈpəʊz tə/
provide for /prəˈvaɪd fɔː/
support /səˈpɔːt/
Hope you find it useful !