welt vs wheal

welt and wheal both are nouns.

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

As nouns, welt and wheal are synonyms defined as:

welt and wheal: a raised mark on the skin (as produced by the blow of a whip); characteristic of many allergic reactions

Other synonyms of welt include wale, weal.

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

welt (verb)	wheal (verb)
put a welt on
beat severely with a whip or rod