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Definitions

stack up

VERB
accumulate
Synonyms
STRONGEST
accrue acquire add to assemble collect compile concentrate expand gain grow hoard increase pile up rack up swell
STRONG
agglomerate aggregate amalgamate cache collocate cumulate gather heap incorporate lump mass pile procure profit stockpile store unite
WEAK
bring together clean up draw together heap together load up make a bundle make a killing roll up round up scare up store up
Antonyms
STRONGEST
contract decrease diminish disperse divide forfeit lessen lose scatter separate shrink spend waste
WEAK
dissipate dwindle squander
VERB
gather
Synonyms
STRONGEST
assemble choose cluster collect congregate convene converge crowd draw flock huddle meet pick round up show up
STRONG
accumulate aggregate amass associate capture concentrate corral cull forgather garner group heap herd hoard marshal mass muster pluck poke punch rally reunite stockpile swarm throng unite
WEAK
bunch up close with draw in gang up get-together hang around hang out make the scene pile up pour in scare up scrape together
Antonyms
STRONGEST
cancel disperse dissemble divide leave miss reject scatter separate spread
STRONG
dissipate lose spend squander throw away waste
WEAK
allot deal distribute grow misunderstand plant
VERB
rise
Synonyms
STRONGEST
accelerate advance ascend build climb double expand go up improve lift move up multiply pick up raise soar swell
STRONG
aggravate arise augment billow bulge deepen distend enhance enlarge heighten inflate intensify levitate magnify mount redouble rouse spread upsurge wax
WEAK
add to go through the roof intensate perk up pile up speed up take off
Antonyms
STRONGEST
contract decelerate decline decrease demolish depress descend destroy diminish divide drop go down lessen lower raze reduce retreat shrink stop weaken worsen
STRONG
calm cave in compress deflate fall soften soothe
WEAK
comply cooperate give in go along recede regress slump
VERB
test
Synonyms
STRONGEST
analyze assess check confirm demonstrate investigate prove question try verify
STRONG
assay experiment inquire substantiate validate
WEAK
experimentalize give a tryout look into make a trial run match up prove out put to the test run idea by someone run it up a flagpole see how it flies see how wind blows send up a balloon shake down try on try on for size try out
Antonyms
STRONGEST
discredit disprove invalidate
VERB
total
Synonyms
STRONGEST
add amount to come to comprise consist of equal pile up reach yield
STRONG
aggregate calculate cast come figure foot number reckon summate totalize tote
WEAK
mount up to result in ring up run into run to sum up
Antonyms
STRONGEST
disproportion fail imbalance
STRONG
estimate guess
WEAK
subtract take away
NOUN
accident
Synonyms
STRONGEST
calamity casualty disaster hazard mishap pileup setback
STRONG
blow collision crack-up fender-bender fluke misadventure misfortune smash total
WEAK
rear-ender smash-up stack-up
Antonyms
STRONGEST
blessing boon good fortune good luck
WEAK
calculation decision intent intention
NOUN
crash
Synonyms
STRONGEST
accident collapse impact pileup wreck
STRONG
bump crack-up crash-land crunch jar jolt percussion ram shock sideswipe smash splashdown thud thump total washout
WEAK
fender bender fender tag rear-ender smash-up
Antonyms
WEAK
blastoff takeoff
NOUN
holding pattern
Synonyms
WEAK
limbo stack-up waiting path
NOUN
mishap
Synonyms
STRONGEST
blunder calamity disaster hazard misfortune mistake pileup setback
STRONG
blow collision crack-up fender-bender fluke misadventure smash total
WEAK
ill fortune rear-ender smash-up stack-up wrack-up
Antonyms
STRONGEST
blessing boon good fortune good luck success

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

If the amount advanced is smaller, or the repayment window shorter, the effective rate can climb well above 100%, which advocates say illustrates how quickly fees can stack up.

From MarketWatch • Feb. 13, 2026

When compliance costs stack up, families pay for it in the form of higher rates and fewer choices.

From Barron's • Jan. 8, 2026

Meanwhile, the cases stack up, among them the minor and the tragic.

From The Wall Street Journal • Jan. 6, 2026

“This is a lot of rain that’s going to stack up over multiple days.”

From Los Angeles Times • Dec. 23, 2025

Military jeeps stack up along the street as they wait for approval to enter the underground parking lots.

From "Legend" by Marie Lu

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.