flattery vs soft soap

flattery and soft soap both are nouns.

Word	Noun	Adjective	Verb	Adverb
flattery	Yes	No	No	No
soft soap	Yes	No	No	No

As nouns, soft soap is a hyponym of flattery; that is, soft soap is a word with a more specific, narrower meaning than flattery:

Other hyponyms of flattery include adulation, blandishment, cajolery, palaver, blarney, coaxing, sweet talk, puffery.

flattery (noun)	soft soap (noun)
excessive or insincere praise	a soft (or liquid) soap made from vegetable oils; used in certain skin diseases
	flattery designed to gain favor