April 2020 Puzzle: Triplets

A somewhat simple puzzle for these dark times. Most of you internet-savvy types should solve this in just a few minutes.

Below are eight sets of three random words. What is the common denominator between the sets?

language	nursery	likening
restrict	nanny	underline
frail	across	kings
ruffling	ladders	riverbed
cult	cobras	fluffed
early	distilled	inner
mystified	potions	farmed
searching	shredding	printer