BUTTONIEST

be bi bo en es et in is it ne no nu oe oi on os si so ti to un us ut

ben bes bet bin bio bis bit bos bot bun bus but ens eon ins ion its neb net nib nit nob nos not nub nus nut obe obi oes one ons ose out sei sen set sib sin sit sob son sot sou sub sue sun ten tet tie tin tis tit toe ton tot tub tui tun tut uns use ute uts

bens bent best bets bine bins bint bios bise bite bits bitt bone bots bott bout buns bunt bust bute buts butt ebon eons etui into ions nebs nest nets nett nibs nite nits nobs noes nose note nous nubs nuts obes obis obit ones onus oust outs sent sett sine site snib snit snob snot snub sone stet stob stot stub stun suet suit tens tent test tets ties tine tins tint tits toes toit tone tons tost tote tots tout tube tubs tuis tune tuns tuts unbe unit unto utes