creaking, leaking, reeking, shrieking, sneaking, speaking, squeaking, eking, freaking, peaking, wreaking, streaking, peeking, tweaking;
berantusias, berapi-api, bergairah, berjiwa keras, berkegiatan, berkemauan, berkobar-kobar, bernafsu, bersemangat, bersosoh, menggebu-gebu, menggelegak