“valuable”: synonyms and related words: 1  a pearl of great price idiom. 2  a place in the sun idiom. 3  advantageous. 4  all-singing. 5  amiss. 6  expedient. 7  favourable. 8  fodder. 9  foil. 10  fruitful. 11  fruitfulness. 12  functionally. 13  palliative. 14  productive. 15  profitable. 16  repay. 17  repay sb's effort, time, attention, etc. idiom. 18  respite. 19  salutary. 20  sniff.