Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class I. Words Expressing Abstract Relations
Section III. Quantity
3. Conjunctive Quantity

37. Addition.

   NOUN:ADDITION, annexation, adjection [rare], junction [See Junction]; superposition, superaddition, superjunction, superfetation; accession, reënforcement; increase [See Increase]; increment.
  AFFIX, codicil, subscript, tag, rider, appendage, continuation, equation, postscript, adjunct, [See Adjunct]; supplement; accompaniment [See Accompaniment]; interlineation, interposition [See Interjacence]; insertion [See Insertion].
  COMPUTATION, footing, totaling, casting, summation.
   VERB:ADD, annex, affix, superadd, subjoin, superpose; clap on, saddle on; tack to, append, tag, adject [rare], attach, postfix, adjoin [rare], ingraft; saddle with; sprinkle; introduce (interpose) [See Interjacence]; insert [See Insertion].
  COMPUTE, foot up, total, cast, sum, count up.
  BECOME ADDED, accrue; supervene, advene.
  REËNFORCE or reinforce, restrengthen; strengthen, swell the ranks of; augment [See Increase].
   ADJECTIVE:ADDED &c. v.; additional; supplement, supplemental, supplementary; suppletive [rare], supervenient [rare], suppletory, subjunctive; adjectitious, adscititious, ascititious; additive, extra, further, fresh, more, new, ulterior, other, remanent [rare]; auxiliary, contributory, accessory; spare.
   ADVERB:au reste [F.]; in addition, more, plus, extra; and, also, likewise, too, furthermore, further, item; and also, and eke [archaic]; else, besides, to boot; et cætera, &c.; and so on, and so forth; into the bargain, cum multis aliis [L.], over and above, moreover.
  with, withal; including, inclusive, as well as, not to mention, let alone; together with, along with, coupled with, in conjunction with; conjointly; jointly [See Junction].
   QUOTATION:Adde parvum parvo magnus acervus erit.