SimilarityRank
mandatory 0.797 7238
be_compulsory 0.772 49804
obligatory 0.699 20984
be_mandatory 0.619 18140
voluntary 0.558 6529
optional 0.547 6363
be_mandatory_for 0.542 51313
Mandatory 0.506 99532
required 0.498 5608
it_be_mandatory 0.496 93758
exemption_from 0.495 46399
a_voluntary 0.493 34699
free_choice 0.489 92799
statutory 0.488 18204
a_minimum 0.486 23588
an_optional 0.478 27198
abolition_of 0.475 93238
be_optional 0.475 16185
the_abolition_of 0.475 40519
stipulate 0.471 25281
supplementary 0.470 31973
exempt 0.462 12917
be_exempt_from 0.457 22378
exempt_from 0.456 62981
subsidise 0.453 27430