take care of the pennies and the pounds will take care of themselves
contribution
contribute
piggyback
pad out
top-up
supersize
big things come in small packages
expandable
small rain lays great dust
reservoir
smallify
enlarge
resize
adder
heapful
fill-out
magnify
compress
a mite
mastodon
make a federal case out of something
a little of something goes a long way
arseful
drop in the pond
incrementally
drop in the ocean
spit in the ocean
giantize
drop in the sea
enlargement
lesser
dovetail
multisize
stockpile
multiplicable
small-time
a bit
subanalysis
a tad
in miniature
magnification
upscaling
many a mickle makes a muckle
pale into insignificance
size
whatabouts
schmear
mix
a few