Mammoth Uncensored Word List:
114 words ending with th, 9 letters long

aftermath alembroth amphipath backcloth bandwidth batholith bathylith billionth bloodbath brandreth buckteeth bucktooth cerecloth charoseth cholelith chrysanth coccolith colocynth coprolith crosspath cyclolith cystolith daylength dishcloth dropcloth dustcloth eightieth facecloth feldspath fifteenth footcloth forecloth foreteeth foretooth forthwith foulmouth frogmouth glidepath goalmouth goldsmith granolith haftaroth haftoroth haggadoth hagiolith haircloth halachoth halakhoth halftruth headcloth hellbroth homebirth homeopath hundredth hydropath ironsmith jacksmith jillionth jobsworth jokesmith labyrinth laccolith locksmith loincloth longcloth loudmouth megadeath megilloth meseemeth microlith millionth misgrowth mortcloth multipath mushmouth neckcloth neuropath ninetieth nongrowth osteopath outgrowth paleolith parashoth phacolith philomath phytolith poormouth pregrowth pyracanth rhinolith sackcloth sailcloth shophroth sialolith sixteenth sociopath songsmith stalworth statolith stenobath tallitoth terebinth therewith thirtieth tollbooth tunesmith twentieth umpteenth washcloth waterbath wherewith wordsmith yeshivoth zillionth