NEPHROID

de do ed eh en er he hi ho id in ne no od oe oh oi on op or pe pi re

den die din dip doe don dor edh end eon ern hen hep her hid hie hin hip hod hoe hon hop ion ire nip nod noh nor ode one ope ore ped peh pen per phi pie pin pod poh poi pro red rei rep rho rid rin rip rod roe

deni dine dino dire doer done dope dore dorp drip drop heir herd hern hero hide hied hind hire hoed hoer hone hope horn inro ired iron nerd nide node nodi noir nope nori ohed oped open pein pend peon peri phon pied pier pine pion pirn pond pone pore porn prod redo rein rend repo ride rind ripe rode rope