a la mode, agreeably, by consensus, compatibly, concordantly, congenially, consonantly, fashionable, fittingly, go-go, groovy, hand in glove, harmoniously, hep, hip, in, in chorus, in concert, in keeping, in line, in step, in unison, into, just right, modish, on the beam, really into, swank, swish, tony, trendy, unanimously