If you're really concerned, talk to your pedi. 10 months is a little old to not be babbling BUT not outside the bounds of normal. Are there other milestones your child has hit early/on time?
Kids pick what areas to focus on. Some focus on gross motor skills (crawling, pulling up, walking), some focus on fine motor skills (pressing buttons, manipulating toys, turning pages) and some focus on communication (babbling, words, etc.). They don't generally focus on all three equally, and usually focus on one or two and leave the others behind. They will generally catch up later.
For instance, my daughter has focussed on fine motor skills (manipulating things, grabbing small items, putting things in and out of other things, light switches, page turning) and communication (early babbler, has three words now) but has little to no interest in gross motor skills (sits up fine, but does not crawl, not even army crawl, does not pull herself up to sitting or standing, rarely if ever rolls over, etc). Checked with her doctor, was reassured that she will get there, it's just not what drives her right now.
Have you tried baby signs instead of working on verbal communication? That might help. It sounds like he's interacting just fine, so maybe bypassing the difficult work of getting lips and tongue and teeth to move together, signs might help him grasp the concept of words relating to items and actions.