Synonyms for scrap

Most common

1. Piece — A (small) piece; a fragment; a detached, incomplete portion. The smallest amount

2. Junk — discarded objects (especially metal) that may be dismantled to recover their constituent materials, junk

3. Fighting

fight, fighting, combat, skirmish, scrimmage

4. Scratching — A piece of deep-fried batter left over from frying fish, sometimes sold with chips

Other

moyle, gubbins

1. Dispute

dispute, quarrel, argufy informal, altercate

2. Cancel — to stop working on (a project or plan) indefinitely

3. Throw out

n. 1
A (small) piece; a fragment; a detached, incomplete portion. The smallest amount.
n. 2
Discarded objects (especially metal) that may be dismantled to recover their constituent materials, junk.
That car isn't good for anything but scrap.
v. 1
To stop working on (a project or plan) indefinitely.
v. 2
To discard; to get rid of.

Plural: scraps → pieces, bits, chips, shreds…
Past participle: scrapped
e.g. scrapped → disputed, quarreled, argufied, altercated…

Use in printed books, per decade from 1850 to 2019.

3 letters: end¹, bit¹, jot¹
4 letters: part¹, drop¹, chip¹, junk¹, toss¹, atom², hunk¹, gash¹
5 letters: fight¹, piece¹, waste¹, trash¹, grain¹, chuck¹, ditch¹, chunk¹, shred¹, abort², flake¹, crumb¹, fleck¹, offal
6 letters: combat², refuse², cancel², debris², litter², morsel², tittle², argufy
7 letters: cutting², portion², dispute², garbage², rubbish², discard², quarrel², gribble², gubbins²
8 letters: fighting², particle³, fragment², skirmish², jettison³
9 letters: scrimmage², scintilla³, altercate
10 letters: scratching²

The small number after each word is its number of syllables (atom² = 2 syllables).