THESAURUS
Add
adjoin, affix, agglutinate, algebraize, amalgamate, annex, append, assimilate, attach, augment, blend, burden, calculate, cast, cipher, clutter, coalesce, combine, come together, complicate, compound, comprise, compute, conjoin, connect, consolidate, cumber, decorate, divide, dope out, embody, encompass, encumber, enlarge, estimate, extract roots, fasten, figure, figure in, figure out, flux, foot, fuse, glue on, hitch on, include, incorporate, increase, infix, integrate, interblend, interfuse, join, join with, lump together, make one, measure, meld, melt into one, merge, mix, multiply, ornament, paste on, plus, postfix, prefix, put together, put with, reckon, reembody, roll into one, saddle, saddle with, score, shade into, slap on, solidify, subjoin, subtract, suffix, sum, summate, superadd, superimpose, superpose, syncretize, syndicate, synthesize, tack on, tag, tag on, take account of, take on, tally, tot, total, tote, unify, unite, unite with, work out
ROGET THESAURUS
Add
Addition
VB
add, annex, affix, superadd, subjoin, superpose, clap on, saddle on, tack to, append, tag, ingraft, saddle with, sprinkle, introduce, insert, become added, accrue, advene, supervene, reinforce, reenforce, restrengthen, swell the ranks of, augment.
Numeration
VB
number, count, tally, tell, call over, run over, take an account of, enumerate, muster, poll, recite, recapitulate, sum, sum up, cast up, tell off, score, cipher, compute, calculate, suppute, add, subtract, multiply, divide, extract roots, algebraize, check, prove, demonstrate, balance, audit, overhaul, take stock, affix numbers to, page, amount to, add up to, come to.