strap vs leather

strap and leather both are nouns.

Word	Noun	Adjective	Verb	Adverb
strap	Yes	No	Yes	No
leather	Yes	No	Yes	No

As verbs, leather is a hyponym of strap; that is, leather is a word with a more specific, narrower meaning than strap:

Other hyponyms of strap include flagellate, scourge, horsewhip, switch, cowhide, cat, birch.

strap (noun)	leather (noun)
whip consisting of a strip of leather used in flogging	an animal skin made smooth and flexible by removing the hair and then tanning
an elongated leather strip (or a strip of similar material) for binding things together or holding something in position
a band that goes over the shoulder and supports a garment or bag
hanger consisting of a loop of leather suspended from the ceiling of a bus or train; passengers hold onto it

strap (verb)	leather (verb)
secure (a sprained joint) with a strap	whip with a leather strap
sharpen with a strap
tie with a strap
beat severely with a whip or rod