| hapan | hapu |
|---|---|
| hapata | hapattaa |
| happo | happe |
| hapokas | hapukas |
| foolihappo | foolhape |
| happi | õhk |
| hapeton | hapuvaba |
| hapettaa | hapendama |
| hapettua | hapnikuga reageeruma |
| hapetus | oksüdeerumine |
| happilaite | oxygen machine, oxygen concentrator |
| happamasti | hapult, ärritunult |
| hapantua | hapnema |
| happamuus | hapukus |
| hapansilakka | hapukala |