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
"This is a fantastic opportunity for our students! I'm sure Spellzone will be invaluable in helping them to improve their spellings and therefore improve the quality of their writing in all subject areas!"
Teacher, High School, UK