THESAURUS
slap on
add, adjoin, affix, agglutinate, annex, append, attach, bedaub, besmear, burden, butter, coat, complicate, conjoin, dab, daub, decorate, enamel, encumber, gild, gloss, glue on, hitch on, infix, join with, lacquer, lay on, ornament, paste on, plus, postfix, prefix, prime, put with, saddle with, slather, smear, smear on, spread on, spread with, subjoin, suffix, superadd, superpose, tack on, tag, tag on, tar, undercoat, unite with