flatter vs truckle

flatter is not a noun while truckle is a noun.

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

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

Other hyponyms of flatter include soft-soap, adulate, stroke, bootlick, fawn, kotow, kowtow, suck up, toady, brown-nose, butter up.

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

flatter (verb)	truckle (verb)
praise somewhat dishonestly	try to gain favor by cringing or flattering
	yield to out of weakness