whip vs strap

whip and strap both are nouns.

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

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

whip: an instrument with a handle and a flexible lash that is used for whipping
strap: whip consisting of a strip of leather used in flogging

As verbs, whip and strap are synonyms defined as:

Other synonyms of whip include flog, lash, lather, slash, trounce, welt.

whip (noun)	strap (noun)
a quick blow delivered with a whip or whiplike object	whip consisting of a strip of leather used in flogging
an instrument with a handle and a flexible lash that is used for whipping	an elongated leather strip (or a strip of similar material) for binding things together or holding something in position
(golf) the flexibility of the shaft of a golf club	a band that goes over the shoulder and supports a garment or bag
a dessert made of sugar and stiffly beaten egg whites or cream and usually flavored with fruit	hanger consisting of a loop of leather suspended from the ceiling of a bus or train; passengers hold onto it
a legislator appointed by the party to enforce discipline

whip (verb)	strap (verb)
subject to harsh criticism	secure (a sprained joint) with a strap
defeat thoroughly	sharpen with a strap
beat severely with a whip or rod	tie with a strap
whip with or as if with a wire whisk	beat severely with a whip or rod
strike as if by whipping
thrash about flexibly in the manner of a whiplash