Word flank with one letter changed

Letter on position 1 (f) changed: 4 words

Letter on position 2 (l) changed: 1 word

frank

Letter on position 3 (a) changed: 1 word

flunk

Letter on position 4 (n) changed: 2 words

flack
flask

Letter on position 5 (k) changed: 1 word

flans