Hexagon
through
azimuth
huckleberry
GURSHSAUGHSHRUGAGHASAARGHHUGSSURAHGASHHAGSAGHASUGHSHAGGUSHUGHSHAARSHAARAAHSUGHRUSHHAGRASHHUGRHUSGUARSAAHAGARSARGUSGAURSSUGARAHSHASSHARAGASASHRAHAHAAGARGAURGARSGUARAGASAURASRAGASHUHAHHARUGARAGSSAGARUGSRAGGASSAGRUGAGSAURAAGAGARSURAURSAAASAGARSRASSAUUSARASAA
Words that can be formed from the letters in "shape" include: has, sap, ape, heap, shape, phase.
You cannot make any seven letter words from these letters. The biggest words that can be made have four letters. They are:AgeeAghaGheeOgee
Seven letters - not eight letters listed in question Bushier
Death valley
Theorem uses the letters listed.
In English the largest word you can make is woaded, which uses six of the seven letters. There are no valid seven-letter combinations from the pattern a d d e h o w.
Hollow.
brushieBushierBushireHerbiusHuberisRubeishruibhseshirube