mama (mummy), da-da (daddy), bandan (brandon), sitDOW!, oush (ouch), mess, 1-4, no, shoes (his favourite), choochoo, uhoh, wheeee, wow-wee , shockut (chocolate), bikker (biscuit), had (head/hat interchangable), hands, how (house/wtf), ba-bi (bye), nini (night night), car, wheel, he also has a large and expressive range of surprised "oh!"s and "oo"s and "aw"s that stand for a lot of words.
He also does a pretty 'meow', and a 'rar' for tiger/monster/anything monstery.
He doesn't have any words for food, or drink, he just goes and helps himself and waves them at me.