A training study examined novel word learning in 2-year-old children and assessed two nonverbal mechanisms, pictures and gestures, which are commonly used as communication support. The aim was to (1) compare these two support mechanisms and measure their effects on expressive word learning and (2) to investigate these effects on word production over an extended time period. At baseline, the children's performance was assessed on vocabulary and grammatical skills, and the groups were matched on these key variables. Eighteen participants were taught novel words either accompanied by a gesture or by a picture. The training consisted of four 20-minute sessions per week over a period of four weeks. Following training, the children were assessed on their ability to produce novel words at three time points: immediately after training, at a 2-week follow-up and at a 6-week follow-up. Gesture training supported word learning significantly better than picture training across all three testing points. Children in both groups showed the best production immediately after training, with a small but nonsignificant decline at 2-week follow-up. There was a significant decline in time 3 compared to time 1, but the children were still able to produce 6.8 out of 10 novel words, suggesting long-term learning. Our findings suggest that gesture may be used to support word learning and could benefit children with late emerging language. The importance of these findings for language development and language intervention are discussed.