1. (verb)append, tag on, tack on, tack, hang on fix to; attach Synonyms: tack together, hang on, assemble, interchange, supply, put together, hang in, set up, tack, alternate, persist, add, tag on, affix, append, flip-flop, supplement, tack on, flip, baste, piece, switch, hold on, hold the line, add on, persevere, wear round
Synonyms and Antonyms of tack on 
