wriggler vs larva

wriggler and larva both are nouns.

Word	Noun	Adjective	Verb	Adverb
wriggler	Yes	No	No	No
larva	Yes	No	No	No

As nouns, larva is a hypernym of wriggler; that is, larva is a word with a broader meaning than wriggler:

wriggler: larva of a mosquito
larva: the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose

wriggler (noun)	larva (noun)
larva of a mosquito	the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose
one who can't stay still (especially a child)