conjunction vs tangency

conjunction and tangency both are nouns.

Word	Noun	Adjective	Verb	Adverb
conjunction	Yes	No	No	No
tangency	Yes	No	No	No

As nouns, tangency is a hyponym of conjunction; that is, tangency is a word with a more specific, narrower meaning than conjunction:

conjunction: something that joins or connects
tangency: (electronics) a junction where things (as two electrical conductors) touch or are in physical contact

Other hyponyms of conjunction include contact, joint, barrier strip, junction barrier, splice, splicing, thermojunction.

conjunction (noun)	tangency (noun)
something that joins or connects	(electronics) a junction where things (as two electrical conductors) touch or are in physical contact
the temporal property of two things happening at the same time	the state of being tangent; having contact at a single point or along a line without crossing
an uninflected function word that serves to conjoin words or phrases or clauses or sentences
(astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac
the grammatical relation between linguistic units (words or phrases or clauses) that are connected by a conjunction
the state of being joined together