1) Be lively and noisy 2) Be rambunctious 3) Carouse 4) Celebrate 5) Engage in loud carousing 6) French word used in English 7) Indulge in revelry 8) Jollify 9) Make happy 10) Make merry 11) Make whoopie 12) Racket 13) Raise a ruckus 14) Revel 15) Revel boisterously 16) Revel noisily 17) Revel riotously Found on https://www.crosswordclues.com/clue/roister
Roist'er intransitive verb [ Probably from French rustre boor, a clown, clownish, from Latin rustucus rustic. See Rustic .] To bluster; to swagger; to bully; to be bold, noisy, vaunting, or turbulent. « I have a roisting challenge sent amongst The dull and factious nob... Found on http://www.encyclo.co.uk/webster/R/90