STEEP, STEEPNESS
ADJECTIVES
1603 ► DOWNSTEEPY steep; steep and precipitous; having a great declivity → obs.
1611 ► SIDELING steep; sloping; having an inclination
1670 ► SMART relatively steep; said of a hill
1731 ► ACCLIVOUS steep; rising with a slope; sloping upwards
1799 ► DECLIVITOUS steep; having a (considerable) declivity or slope
1859 ► PROCLIVITOUS steep → obs.
NOUNS
1594 ► SUDDENNESS steepness, abruptness → obs.
1624 ► ABRUPT a steep or abrupt place; a precipice; a chasm, an abyss → obs.
1883 ► ABENT a steep place → Eng. dial. (Bk.)
1903 ► CREMNOPHOBIA a dread of precipices or steep places
.M20 ► DROP-OFF a steep drop; a declivity; a cliff → N. Amer.
Lexicophilia 