makaku,
pl. bamakaku (class 1a/2 : - / ba-)
likaku,
pl. makaku (class 5/6 : li- / ma- (parts of body, fauna, flora,...))
likáko,
pl. makako (class 5/6 : li- / ma- (parts of body, fauna, flora,...))
makako,
pl. bamakako (class 1a/2 : - / ba-)
monkey, macaque
as it is a borrowed word, the correct form is "makaku" for the singular and "bamakaku" for plural, but as ma- sounds like the plural of a word starting with li- you might sometimes hear "likaku, makaku ".