Difference between Squabble and Niggle

SQUABBLE vs NIGGLE: NOUN

To engage in a bad-tempered argument, often over a trivial matter; bicker. : argue.
To debate peevishly; to dispute.
To contend for superiority in an unseemly manner; to scuffle; to struggle; to wrangle; to quarrel.

To cause one to be persistently preoccupied, annoyed, or uncomfortable.
To pester someone or be annoying or uncomfortable in a persistent way.
To be overly concerned or argumentative, especially about something petty; fuss.
To preoccupy, annoy, make uncomfortable in a persistent way.
To pester or nag (someone).
To be finicky or excessively critical; to potter; esp., to work with excessive care for trifling details, as in painting.
To move about restlessly or without result; to fidget.
To fret and snarl about trifles.
To act or walk mincingly.
To trifle or play.

To disarrange, so that the letters or lines stand awry or are mixed and need careful readjustment; -- said of type that has been set up.

Synonyms To jangle. See quarrel, n.
In printing, to disarrange andmix (lines of composed types) when they are standing on their feet.
To engage in a noisy quarrel or row; wrangle; quarrel and fight noisily; brawl; scuffle.

Brawl, Quibbling, Dustup, Wrangling, Quarrel, Dispute, Pettifog, Brabble, Niggle, Quibble, Fuss, Bicker, Spat, Bickering, Tiff

Physio, Achilles, Tiredness, Discomfort, Whinge, Cramp, Hamstring, Soreness, Pettifog, Brabble, Bicker, Fret, Squabble, Quibble, Fuss

Wrangle, Hassle, Row, Fight, Argument, Quibbling, Dustup, Dispute, Niggle, Quibble, Fuss, Bicker, Spat, Bickering, Tiff

Adductor, Kidology, Underdone, Abductor muscle, Physio, Achilles, Tiredness, Discomfort, Whinge, Cramp, Hamstring, Soreness, Bicker, Quibble, Fuss

Coventry when he goes off ndash; will be a niggle but not a defining factor.
One niggle that was finally seen to was an ill-fitting engine access cover.
What if I miss a session, pick up a niggle or get sick?
Like Niggle, Tolkien came to abandon other projects or graft them onto his "Tree," Middle-earth.
Kolasinac is ruled out for 10 weeks and Monreal didn't travel due to a niggle.
For the first time in my life, I felt a tiny niggle of fear.
Chronic Achilles pain does not necessarily prevent activity but can niggle away affecting performance.
With that minor niggle to one side the story itself absolutely captivated me.
Niggle has other pressing work duties as well that require his attention.
Norwich, does niggle slightly when backing them to keep a clean sheet.