Synonyms and related words :
add, adjoin, affix, agglutinate, annex, append, attach, burden, complicate, conjoin, decorate, encumber, glue on, hitch on, infix, join with, ornament, paste on, plus, postfix, prefix, put with, saddle with, slap on, subjoin, suffix, superadd, superpose, tag, tag on, unite with