Word brock with one letter changed

Letter on position 1 (b) changed: 3 words

Letter on position 2 (r) changed: 1 word

block

Letter on position 3 (o) changed: 2 words

brack
brick

Letter on position 4 (c) changed: 1 word

brook

Letter on position 5 (k) changed: 1 word

broch