feigning vs lip service

feigning and lip service both are nouns.

Word	Noun	Adjective	Verb	Adverb
feigning	Yes	No	No	No
lip service	Yes	No	No	No

As nouns, lip service is a hyponym of feigning; that is, lip service is a word with a more specific, narrower meaning than feigning:

feigning: pretending with intention to deceive
lip service: an expression of agreement that is not supported by real conviction

Other hyponyms of feigning include bluff, pretext, stalking-horse, hypocrisy.

feigning (noun)	lip service (noun)
the act of giving a false appearance	an expression of agreement that is not supported by real conviction
pretending with intention to deceive