be | become

deeply, extremely, highly, very
his highly characteristic features

entirely, utterly | fairly, quite

of
a problem that was fairly characteristic of late eighteenth century society

defining, distinctive, distinguishing, identifying, individual, marked, special, striking, unique | personal | common, family, inherited, national, shared | basic, general | chief, dominant, main, major, outstanding, principal | essential, fundamental, important, key, salient | desirable | behavioural, biological, cultural, demographic, economic, genetic, physical, psychological, racial, sexual, social | human

have
The two species have several characteristics in common.