welt vs horsewhip

welt and horsewhip both are nouns.

Word	Noun	Adjective	Verb	Adverb
welt	Yes	No	Yes	No
horsewhip	Yes	No	Yes	No

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

Other hyponyms of welt include flagellate, scourge, leather, switch, cowhide, cat, birch.

welt (noun)	horsewhip (noun)
a raised or strengthened seam	a whip for controlling horses
a raised mark on the skin (as produced by the blow of a whip); characteristic of many allergic reactions

welt (verb)	horsewhip (verb)
put a welt on	whip with a whip intended for horses
beat severely with a whip or rod