green soap vs soap

green soap and soap both are nouns.

Word	Noun	Adjective	Verb	Adverb
green soap	Yes	No	No	No
soap	Yes	No	Yes	No

As nouns, soap is a hypernym of green soap; that is, soap is a word with a broader meaning than green soap:

green soap: a soft (or liquid) soap made from vegetable oils; used in certain skin diseases
soap: a cleansing agent made from the salts of vegetable or animal fats

green soap (noun)	soap (noun)
a soft (or liquid) soap made from vegetable oils; used in certain skin diseases	a cleansing agent made from the salts of vegetable or animal fats
	street names for gamma hydroxybutyrate
	money offered as a bribe

green soap (verb)	soap (verb)
	rub soap all over, usually with the purpose of cleaning