Wiktionary
boulderlike
a. Resembling or characteristic of a boulder.
Usage examples of "boulderlike".
All he could hope for was that some Cygnan maintenance worker might come through there, past the boulderlike protuberances embedded in the floor, in time to set off an alarm.
It was moving up through the mountain with inexorable determination, cutting a path for itself with its broad stubby boulderlike teeth: gnawing on rock, digesting it, excreting it as moist sand at the far end of a massive fleshy body thirty man-lengths long.
Sarge, Soviet 130mm guns, the size of telephone poles, let loose with boulderlike shells.
It was in fact a rad, of the same sort as was on Sol, and on any world: the boulderlike base for an emerging filament.