soften vs truckle

soften is not a noun while truckle is a noun.

Word	Noun	Adjective	Verb	Adverb
soften	No	No	Yes	No
truckle	Yes	No	Yes	No

As verbs, truckle is a hyponym of soften; that is, truckle is a word with a more specific, narrower meaning than soften:

soften (noun)	truckle (noun)
	a low bed to be slid under a higher bed

soften (verb)	truckle (verb)
become soft or softer	try to gain favor by cringing or flattering
make soft or softer	yield to out of weakness
lessen in force or effect
make less severe or harsh
protect from impact
make (images or sounds) soft or softer
give in, as to influence or pressure