thigh

thy

mouth (noun)

mouth (verb)

teeth (noun)

teethe (verb)

wreath (noun)

wreathe ( verb)

ether

either

cloths (noun)

clothes (vowel sound change & noun)

cloth (noun)

clothe (vowel sound change & verb)

bath (noun)

bathe (vowel sound change & verb)

breath (noun)

breathe (vowel sound change & verb)

sooth (adj. or noun)

soothe ( verb)