niggle

As nouns the difference between riggle and niggle

is that riggle is (uk|dialect) the european lancefish while niggle is a minor complaint or problem.

As verbs the difference between riggle and niggle

is that riggle is while niggle is to trifle with; to deceive; to mock.

As verbs the difference between niggled and niggle

is that niggled is (niggle) while niggle is to trifle with; to deceive; to mock.

As a noun niggle is

a minor complaint or problem.

As nouns the difference between niggle and piggle

is that niggle is a minor complaint or problem while piggle is (rare) a long-handled fork for mixing or digging.

As verbs the difference between niggle and piggle

is that niggle is to trifle with; to deceive; to mock while piggle is to dig or uproot; to scrape.