Synonyms for boost Found 11 synonyms across 5 meanings for “boost”. the act of giving hope or support to someone (noun) encouragement an increase in cost (noun) risehike increase (verb) hike contribute to the progress or growth of (verb) promoteadvancefurtherencourage increase or raise (verb) supercharge Explore Related Words Rhymes with boostSynonyms for encouragementSynonyms for riseSynonyms for hikeSynonyms for hikeSynonyms for promote Synonym Finder | Rhyme Finder | Poetry Editor