amass

verb

ə-ˈmas 

amassed; amassing; amasses

transitive verb

1

: to collect for oneself : accumulate

amass a great fortune

2

: to collect into a mass : gather

must select rather than simply amass details

intransitive verb

: to come together : assemble

Dark clouds amassed over the city.

amasser noun

amassment

ə-ˈmas-mənt 

noun

Synonyms of amass

• collect
• gather
• assemble
• accumulate
• garner

Examples of amass in a Sentence

They've amassed a wealth of information.

amassed a truckload of donations in the course of their canned food drive

Recent Examples on the Web

Lynch played 12 seasons for the Buffalo Bills, Seattle Seahawks and Oakland Raiders, amassing 10,413 yards in 2,453 carries with 85 touchdowns. —Los Angeles Times, 13 Mar. 2026

After launching at a single location in 1916 and amassing a following, Nu-Way Weiners opened its second location in 1948; planting the seeds for what is now a restaurant mini chain. —Karla Walsh, Southern Living, 13 Mar. 2026

The plumping moisturizer has amassed a huge fanbase, which counts Jennifer Garner and Tate McRae (both Neutrogena spokeswomen) as loyal members. —Sophie Wirt, InStyle, 11 Mar. 2026

Videos of their confrontations have amassed millions of views online. —Rafa Sales Ross, Variety, 11 Mar. 2026

Word History

Etymology

Anglo-French amasser, from a- (from Latin ad-) + masser to gather into a mass, from masse mass

First Known Use

15th century, in the meaning defined at transitive sense 1

Rhymes for amass

• alas
• bromegrass
• bypass
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse
• jackass

Kids Definition

amass

verb

ə-ˈmas 

: to collect into a mass : accumulate

amasser noun