Letter on position 1 (h) changed: 9 words bums fums gums lums mums rums sums tums vums Letter on position 2 (u) changed: 4 words hams hems hims homs Letter on position 3 (m) changed: 8 words hubs hues hugs huis huns hups huss huts Letter on position 4 (s) changed: 3 words huma humf hump