Carol

Noun

 * 1) A round dance accompanied by singing.
 * 2) A song of joy.
 * 3) A religious song or ballad of joy.
 * They sang a Christmas carol.

Verb

 * 1)  To sing in a joyful manner.
 * 2)  To sing carols, especially Christmas carols in a group.
 * 3)  To praise (someone or something) in or with a song.
 * 4)  To sing (a song) cheerfully.

Thesaurus
Brautlied, Christmas carol, Kunstlied, Liebeslied, Volkslied, alba, anthem, art song, aubade, ballad, ballade, ballata, barcarole, blues, blues song, boat song, bridal hymn, brindisi, cackle, call, calypso, canso, canticle, canzone, canzonet, canzonetta, caper, caracole, cavatina, caw, chanson, chant, chantey, chatter, cheep, chirk, chirp, chirr, chirrup, chitter, choir, chorus, chuck, clack, clap hands, cluck, cock-a-doodle-doo, coo, croak, cronk, croon, croon song, crow, cuckoo, dance, delight, descant, dirge, ditty, do-re-mi, drinking song, drum, epithalamium, exult, folk song, frisk, frolic, gabble, gaggle, gambol, glory, gobble, guggle, honk, hoo, hoot, hum, hymeneal, hymn, intonate, intone, joy, jubilate, lay, lied, lilt, love song, love-lilt, matin, minstrel, minstrel song, minstrelsy, national anthem, peep, pip, pipe, prothalamium, psalm, quack, quaver, rejoice, revel, roll, rollick, romp, roulade, scold, serena, serenade, serenata, shake, sing, sing in chorus, skip, skip for joy, sol-fa, solmizate, song, squawk, theme song, torch song, tremolo, trill, troll, tweedle, tweedledee, tweet, twit, twitter, vocalize, war song, warble, wedding song, whistle, yodel