1. cognize
2. cognise, experience
3. live, experience, undergo, see, go through, acknowledge
4. recognize, recognise, accept, roll in the hay
5. love, make out, make love, sleep with, get laid, have sex, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk, copulate, mate, pair, couple, recognize
6. recognise, realize, realise, agnize, agnise, distinguish
7. separate, differentiate, secern, secernate, severalize, severalise, tell, tell apart, remember
7. retrieve, recall, call back, call up, recollect, think