skinny tie vs necktie

skinny tie and necktie both are nouns.

Word	Noun	Adjective	Verb	Adverb
skinny tie	Yes	No	No	No
necktie	Yes	No	No	No

As nouns, necktie is a hypernym of skinny tie; that is, necktie is a word with a broader meaning than skinny tie:

skinny tie: a necktie that is narrower than the standard tie, and often all-black.
necktie: neckwear consisting of a long narrow piece of material worn (mostly by men) under a collar and tied in knot at the front

Other hypernyms of skinny tie include tie.

skinny tie (noun)	necktie (noun)
a necktie that is narrower than the standard tie, and often all-black.	neckwear consisting of a long narrow piece of material worn (mostly by men) under a collar and tied in knot at the front