k here they are i am sure there are more: More Excess Abundance Added Additional Ancillary Another Auxiliary Beyond Extraneous Extraordinary In addition Inessential Copius Supply Lush Rich Plentiful A lot Vast Amount Plentiful Amount
positive, extra, additional
Possible synonyms for adds on can be found in thesauruses and online. Some of the synonyms are addition, extra, supplement, attachment and complement.
backing, support, supplement, extra, addition
secondary, additional, extra, subsidary, supplementary
bonus, share, cut, gain, extra, plus, portion, divvy
as a result, accordingly, therefore, thus, very, really, extremely, extra
extra, addition, supplement, attachment, appendage, accomplice, partner, ally, assistant, helper, collaborator
A surplus is an extra amount of something, I guess you could compare them to leftovers in our time, but some synonyms are: excess, superabundance, surfeit, oversupply, remains, profusion, plethora, etc., etc., etc.
Some synonyms for the word onto are adjacent, against, another one would be the word toward. Extra words would be bag, capture, hook land and snag, snap, and seize.
Another tree grew in the backyard. I want anothercookie. The baseball team needs another pitcher.
They are synonyms.
Synonyms