foot vs paratroops

foot and paratroops both are nouns.

Word	Noun	Adjective	Verb	Adverb
foot	Yes	No	Yes	No
paratroops	Yes	No	No	No

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

foot (noun)	paratroops (noun)
travel by walking	infantry trained and equipped to parachute
any of various organs of locomotion or attachment in invertebrates
the pedal extremity of vertebrates other than human beings
lowest support of a structure
a support resembling a pedal extremity
the part of the leg of a human being below the ankle joint
(prosody) a group of 2 or 3 syllables forming the basic unit of poetic rhythm
an army unit consisting of soldiers who fight on foot
the lower part of anything
a member of a surveillance team who works on foot or rides as a passenger
a linear unit of length equal to 12 inches or a third of a yard