Yes, "ni" is fine. As long as it doesn't end with ん, 'cause no word in Japanese starts with that kana.

[answering questions, not playing at the moment]

大蒜　(にんにく)　Ni-n-ni-ku -> Garlic

(I don't often see garlic written in kanji though)

くじ - kuji - lottery, drawing, lot, etc.

実 (じつ) - truth

つもりーtsumori- intention

ri...

理解ーりかい－rikai - understand

色 - いろ - iro - color

老化 - rouka - aging/ageing

カイローkairo- Cairo

ro...

驢馬　（ろば） ro-ba -> donkey