figging figling filfili filipin filippi fill-in fill-up filling finniff finning flip-in flip-up fliping flippin fuffing fugging fuguing fulfill fuligin fulling funning gigging gilling gingili ginging ginning gipping guffing gugging guiling guiping gulfing gulling gulping gunging gunning igiugig in-fill inguin- ippling li-ning ligging liguli- lin-pin lingui- linning linping lipping luffing lugging lulling lungful lunging lungung lupinin lupulin nginiig nifling nigging nilling nipping nulling nun-gig nunguni nunning piffing pigging pigling pil-pil pilling pilluni pilning pinging pinguin pinigin pinipig pinning pip-pip pipling pipping plug-in puffing pugging pui-pui pull-in pull-up pulling pullpin pulping punning pupping unflung upfling upflung