laughed

derived

started

stopped

analysed

covered

looked

described

boasted

danced

observed

shouted

walked ('alk' sounds like:

-'ork'ed)

scrutinised

pointed

wrote

listened

decided

worked ('ork' sounds like:

-'irk'ed)

opened

evaluated

traced

classified

educted

screamed

negated

heard

calculated

compared

concluded

defined

contrasted

examined

demonstrated

explained

interpreted

explored

investigated

identified

listed

justified

reflected

outlined

refuted

reviewed

stated

summarised

supported