Mammoth Uncensored Word List:
26 words ending with ph, 8 letters long

airgraph anaglyph anamorph apograph biograph biomorph biotroph cenotaph diaglyph diagraph epigraph gallumph geoglyph harrumph isograph isomorph myograph neomorph odograph subgraph syngraph theosoph triglyph trigraph trimorph zoomorph