earnt

Etymology
From.

Usage notes

 * Written, this is an uncommon (<0.5% as common as in the British National Corpus) alternative form of the simple past and past participle earned. This form is, however, more commonly spoken than written. Other verbs which can be conjugated in this way are: burn (burnt), dream (dreamt), dwell (dwelt), kneel (knelt), lean (leant), leap (leapt), learn (learnt), smell (smelt), spell (spelt), spill (spilt), and spoil (spoilt). But those forms are considered standard, whereas "earnt" is often considered non-standard.