engine vs dinkey

engine and dinkey both are nouns.

Word	Noun	Adjective	Verb	Adverb
engine	Yes	No	No	No
dinkey	Yes	No	No	No

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

engine: a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks
dinkey: a small locomotive

engine (noun)	dinkey (noun)
motor that converts thermal energy to mechanical work	a small locomotive
a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks
an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.
something used to achieve a purpose