sum - noun
sum - verb
sum - thesaurus
add
aggregate
amount
center
centre
core
essence
gist
heart
inwardness
join
kernel
marrow
meat
nub
pith
substance
summarise
summarize
summate
summation
tally
tot
total
totality
union
Scrabble score = 5
"Spellzone is incredibly easy to access and caters for a wide range of abilities, which means you can use it throughout the school at a range of levels, making it fantastic value for money as a learning resource."
Anne Shisler, SENCO, City of London School for Girls