pipeline vs grapevine

pipeline and grapevine both are nouns.

Word	Noun	Adjective	Verb	Adverb
pipeline	Yes	No	No	No
grapevine	Yes	No	No	No

As nouns, pipeline and grapevine are synonyms defined as:

Other synonyms of pipeline include word of mouth.

pipeline (noun)	grapevine (noun)
a pipe used to transport liquids or gases	gossip spread by spoken communication
gossip spread by spoken communication	any of numerous woody vines of genus Vitis bearing clusters of edible berries